Plug Supernet's /22 shifted to Bizz, but AS264311's silence does

Summary

Plug Supernet's former IPv4 block, 138.122.100.0/22, was changed in the Brazilian registry to Bizz Internet on 10 March 2026. RIPE collectors last saw it under Plug's AS264311 on 11 March and first saw Bizz's AS263652 originate it on 12 March.
Bizz's Supernet transition page says existing internet service, plans and installations remain active, while directing customers to Bizz's application, support and expanded offers. That is evidence of Bizz's continuity promise, not proof that every account migrated, an acquisition occurred or every physical asset and obligation transferred.
Pole-access lists and public contracts place Plug's historical operating footprint in Santa Maria de Itabira and Morro do Pilar. A June 2026 pole list names Bizz rather than Plug in Santa Maria, yet still names Plug in Morro do Pilar, leaving a material residual boundary to resolve.
The evidence is negative for Plug as a current independent routed network: AS264311 has no visible routes, neighbours or registered autonomous-system record. The evidence is only partial for the replacement access network because topology, backhaul capacity, power resilience, crew coverage and tested failover remain undisclosed.

A public-edge transition visible from the street to the global routing table

Regional internet providers often change ownership, brands or upstream carriers with little that an outside observer can align precisely. Plug Supernet is different. Three public records expose a narrow March 2026 sequence. The Registro.br RDAP record for 138.122.100.0/22 says the block was last changed at 15:10 UTC on 10 March. It now identifies Bizz Internet Ltda, CNPJ 06.537.806/0001-08, as registrant and AS263652 as the attached autonomous system. RIPE's routing history for the block then shows AS264311 through 11 March and AS263652 from 12 March. Finally, Bizz's page addressed to Supernet customers says that service continues normally and that the existing plan and installation remain active.

Together, those records establish a change in operational control at the internet-facing edge. The address block did not simply vanish. It crossed from an origin identified with Plug to one identified with Bizz, and the customer message was written to minimise disruption. The timing makes a coincidental upstream change unlikely: the registry holder, route origin and retail interface all moved in the same direction within the same transition period.

But the public facts stop short of a legal conclusion. Bizz does not call the change an acquisition on the transition page. No public purchase agreement, corporate filing or asset schedule located for this review says that Bizz bought Plug's shares, ducts, poles, optical line terminals, radios, vehicles or customer contracts. “Your installation remains active” is evidence that Bizz intended to preserve a working access service, not proof that every account migrated or a title deed for the cable entering a particular house.

The correct description is therefore a verified change in public IPv4 registration and origin accompanied by a customer-facing transition claim. Anything broader requires evidence that has not been published.

This distinction matters because Plug is still a legal company in public commercial mirrors, while its named autonomous system is not a current routed network. An active company registration can coexist with a retired network edge, residual contracts or assets in another town. Conversely, customers can remain online under Bizz even if the former Plug corporate entity performs no routing. Treating all those layers as one entity would hide the very risk the evidence reveals: the service may continue while responsibility for a fault changes underneath it.

Plug's legal history outlasted its independent route

Plug Supernet Telecon Serviços de Informatica Ltda was not merely a label attached to an address block. A Brazilian federal gazette published on 31 January 2014 records Anatel Act 282 of 22 January 2014, authorising CNPJ 17.331.528/0001-46 to provide Serviço de Comunicação Multimídia, or SCM, indefinitely across Brazil. The authorisation established a regulatory basis for broadband service. It did not promise that Plug would operate forever, cover the whole country, or retain a particular address resource.

A current commercial mirror of Receita Federal registration data identifies the company as active, opened on 21 December 2012, with R$20,000 in declared capital and an address in Santa Maria de Itabira. It lists internet access as the principal activity and telecommunications, network maintenance, electrical installation and communications-equipment repair among secondary activities. Those classifications are useful context for the range of work the company was allowed to conduct. They do not prove that any activity was being performed on 15 July 2026, and the commercial site is a mirror rather than a fresh official certificate.

There is also historical internet-community evidence. Plug appears in LACNIC's 2024 electoral roll, and PeeringDB's organisation record retains the Supernet name, the Santa Maria address and a website last updated in 2022. Yet a current PeeringDB query for a network with ASN 264311 returns no network entity. The organisation record is a historical identity marker, not proof of current interconnection.

The strongest current test is the registry itself. A request for the AS264311 RDAP entity returns no current record, while the former IPv4 block names Bizz and the former IPv6 allocation also lacks a current entity. RIPE's routing-status view of AS264311 at 08:00 UTC on 15 July 2026 counted zero IPv4 routes, zero IPv6 routes, zero visible neighbours and zero address space. A licence history and an active corporate status cannot outweigh that direct evidence when the question is whether Plug still operates an independent public network. The silent ASN does not, by itself, establish that the company ceased trading, every customer migrated, or every fibre and wireless asset changed hands.

What Bizz promised the customer, and what it did not

Bizz's transition language is unusually concrete at the retail layer. On the Supernet transition page, the company says the internet continues working normally, customers need not change anything, and the existing plan and installation remain active. It offers a new account application, Bizz support and additional speed options, while preserving the Supernet WhatsApp number, (31) 3838-2122. The promise is designed around continuity: the customer should experience a new service interface without rewiring the home merely because the brand and operator-facing systems changed.

The same address reinforces that continuity. Bizz's current service-centre page lists Rua Custódio Pires 69 in central Santa Maria de Itabira. That is the address retained in Plug's older public records and on Supernet's legacy website. A stable storefront can be operationally important in a small market. It gives subscribers a place to report a damaged drop, return equipment or chase a failed visit even while account handling moves to a different company.

Bizz's contracts page adds another clue by listing notices for changes to Plug Supernet bundles and the discontinuation of Plug Supernet plans alongside Bizz's current SCM contract material. That is consistent with a managed migration rather than an overnight abandonment. It also means the phrase “your plan remains active” should not be read as a guarantee that every product will remain unchanged indefinitely. Continued service and eventual product rationalisation can occur together.

What the page does not say is just as important. It does not identify the effective date of a corporate transaction, the buyer and seller, the inventory of transferred assets, the entity issuing every invoice, or the party responsible for historical liabilities. It does not say whether Plug's Morro do Pilar activity moved on the same date. It does not describe whether customer-premises routers remained owned by Plug, became Bizz property or were already held in customer custody. It gives no network diagram, no escalation path for faults that cross a shared pole or upstream, and no promise that Bizz preserved a second route.

For households, the transition page is strong evidence that an operating service was intended to continue. For infrastructure assessment, it is only the beginning. Continuity at the billing and support layer is not the same as continuity of spares, crew knowledge, route diversity or backup power. A smooth migration depends on both, but only the customer-facing half is publicly described.

The /22 records a control change, not the path of a cable

The block 138.122.100.0/22 contains 1,024 IPv4 addresses. That arithmetic is exact; almost every conclusion people are tempted to draw from it is not. The block size is not a subscriber count because one customer may use carrier-grade address translation, several addresses, no public IPv4 address, or a dynamic lease. It is not a capacity figure because addresses do not measure optical bandwidth, backhaul throughput or packets per second. It is not a route map because BGP advertises reachability, not the physical road or pole line taken by a fibre.

The block is nevertheless the clearest record of the handover. Registro.br lists Bizz as registrant, AS263652 as the autonomous system and 10 March 2026 as the last-change date. RIPE's routing status at 08:00 UTC on 15 July 2026 shows AS263652 originating the aggregate and both more-specific /23 routes, visible to 325 of 326 observing IPv4 peers. The prefix overview at the same observation time independently reports that it is announced by Bizz. The March history places the old and new origins on adjacent days: Plug's AS264311 through 11 March, then Bizz's AS263652 from 12 March.

That sequence supports a coordinated origin transition. It does not show whether customer sessions were interrupted for seconds, hours or not at all. Daily and eight-hour observation intervals can miss a short withdrawal. Nor does broad global visibility prove that traffic reached every local subscriber; an operator can announce a prefix successfully while an access segment, optical line terminal or backhaul circuit is down.

IPv6 provides a sharper sign of retirement. Plug's 2804:25f0::/32 first appeared under AS264311 in January 2016, according to RIPE's routing status for the prefix at 08:00 UTC on 15 July 2026. RIPE last saw it on 11 March 2026, and no observing IPv6 peer saw the route at that July observation time. A Registro.br request for the allocation returned no current entity. Bizz may provide IPv6 through another allocation, or it may not; the public records reviewed here cannot establish the current customer configuration. What they do establish is that Plug's former IPv6 identity did not follow the IPv4 block into a visible Bizz announcement.

The /22 should therefore be read as a control marker. It says who can authoritatively register and originate those addresses today. It says nothing conclusive about who owns the pole attachments below them. That lower layer needs physical and contractual evidence.

A single named upstream made autonomy conditional

Before the migration, public registration snapshots showed a narrow interconnection design. A January 2026 historical WHOIS capture associated AS264311's import and export policy with AS269096, North Tecnologia. The same snapshot put North's contact in the abuse role, while Plug personnel appeared in administrative or technical roles. Because this is a third-party capture rather than today's registry, it should be used as historical corroboration only. Still, it agrees with the older prefix records and with the absence of a public exchange footprint.

No current PeeringDB network record for AS264311 identifies an internet exchange, facility or alternate transit. No route observed at the cut-off identifies a current Plug neighbour, because AS264311 is not visible at all. For the replacement origin, RIPE's AS-neighbour view of AS263652 at 00:00 UTC on 15 July 2026 observes AS269096 and AS52601 as adjacencies. The AS269096 observation is consistent with North remaining in the regional routing chain, but an AS adjacency does not establish commercial direction, circuit count or physical path diversity.

This does not prove that only one physical circuit exists. Two fibres can terminate on one upstream ASN; one contract can contain diverse paths; a private backhaul may be invisible to BGP; and Bizz can reroute traffic inside its own network without exposing a second public neighbour at the Santa Maria edge. The opposite inference is equally unsafe: a larger regional operator and a globally visible prefix do not prove independent entrances, separate ducts or a tested standby link.

The evidence-supported conclusion is narrower. Plug did not publish a diverse peering fabric, and its visible policy depended on North. Bizz now controls the public origin, while North remains visible in Bizz's upstream path. A North outage, a Bizz core fault, or a common fibre cut could therefore affect Santa Maria unless private diversity exists. The settling evidence would be route-level circuit records, provider contracts, physical entrance drawings and a failover test showing that traffic survives the loss of the primary path. None is public.

Pole records track the transition, except in Morro do Pilar

Brazilian BGP data locates control in an abstract network. Cemig's pole-sharing records bring the question closer to the street. A public copy of Cemig's Empresa Legal list printed on 3 December 2024 names Plug Supernet as an authorised cessionary in Santa Maria de Itabira. That is meaningful physical evidence: an access provider using the electric utility's poles needs a lawful attachment relationship. It supports the presence of aerial plant in the municipality more directly than an IP geolocation page ever could.

The Cemig list printed on 8 June 2026 changes the local picture. Under Santa Maria de Itabira it names Bizz's earlier corporate name, FAXT Telecomunicações, as well as Claro, Companhia Itabirana, Itanel, North and Oi. Plug is no longer in that municipal row. The alignment with the March address migration and Bizz's customer page is strong: the entity visible at the public route and customer interface also appears in the current pole-access context.

There is an important exception. The same June 2026 document still lists Plug Supernet in Morro do Pilar. That prevents a clean claim that Plug's physical operating footprint disappeared everywhere when AS264311 went silent. The entry may reflect active attachments, a contract awaiting administrative change, or infrastructure still managed under Plug's name. It does not reveal which explanation is correct. It does, however, place a concrete residual question outside Santa Maria: who maintains the plant and answers faults in Morro do Pilar after the public routing identity has moved?

Cemig's lists have strict evidentiary limits. They are organised by municipality and cessionary, not by pole number, cable segment or route geometry. They do not count attachments, distinguish feeder from drop fibre, show utilisation, identify optical splitters, or say whether two providers share the same physical path. A company can appear because it has one lawful attachment or a large network. Absence from a row can mean a completed transfer, a lapse, or a timing difference in administrative records. These are not maps from which an exact fibre route can be drawn.

Even with those limits, the two snapshots do more than generic marketing coverage. They show a historical Plug pole relationship in Santa Maria, a current Bizz-linked relationship there, and a surviving Plug listing in Morro do Pilar. Any complete account of the transition must reconcile all three.

Public contracts put the old service on identifiable ground

Municipal and state records provide another kind of physical evidence: named service endpoints and maintenance duties. A Santa Maria de Itabira municipal notice from 2021 extended Contract 081/2017 with Plug for symmetric internet service over a “mixed network.” The extension covered June and July 2021 at R$5,355.44. The wording proves that Plug had an operating relationship with the municipality and that the contracted service was not described as a purely residential retail line.

“Mixed network” should not be overtranslated into a precise engineering design. It may describe a combination of media, network segments or service arrangements, but the notice does not inventory fibre spans and radio hops. Plug's legacy retail site advertised fibre, while the company's wider public profile has long associated it with fibre and wireless access. No current spectrum authorisation, tower schedule, antenna coordinate or radio-link path was located to establish which wireless segments remained active in 2026.

A Minas Gerais state record published in 2022 identifies Plug as the broadband provider for the state agricultural office, ESLOC Santa Maria de Itabira, under a service running to May 2023. That adds a non-residential endpoint in the municipality. It does not establish whether the office renewed, migrated to Bizz, or now uses another carrier.

Morro do Pilar records are even more useful because they match the residual Cemig listing. A 2023 Minas audit-court record describes Plug providing internet by fibre with preventive and corrective maintenance for municipal education. The accounting entry is narrow and cannot be treated as the value or reach of the whole network, but its language connects Plug to field maintenance as well as transport.

In 2024, a municipal publication for Contract 104/2024 contracted Plug for temporary fibre service stated at 4 Gb/s for the Forró do Morro festival and a motorcycle event at Campo Municipal Zanine Junior. The dated event windows make this a real service requirement, not a generic product claim. Yet a signed contract is not an acceptance certificate. It does not prove that 4 Gb/s was delivered end to end, sustained under load, or available to ordinary customers after the events.

These records locate obligations rather than cables. They show that Plug served public bodies in Santa Maria and Morro do Pilar, that at least one Morro do Pilar engagement explicitly required fibre and maintenance, and that a temporary high-capacity order existed. They do not show the current owner of the installed plant. For a service transition, that distinction is operationally decisive: the party that invoices a subscriber may need a different party's crew, pole rights or records to repair yesterday's installation.

Santa Maria's economics begin with distance and field work

IBGE's profile of Santa Maria de Itabira reports 10,485 residents in the 2022 census across 597.441 square kilometres, a density of 17.55 people per square kilometre. The 2025 population estimate is 10,718. Those municipal figures do not say how many people live inside Bizz's service footprint, and they should not be used to imply that Plug or Bizz covers all rural territory. They do explain the economic setting: a small potential customer base is spread across a relatively large administrative area.

Fixed-network economics are unforgiving in that setting. Revenue arrives one subscription at a time, while poles, feeder fibre, splicing, optical ports, radios, vehicles and trained technicians are lumpy costs. A dense urban street can share a feeder and splitter among many homes. A distant farm, public office or event site may require a long drop, a radio relay or a dedicated visit before it generates one bill. The useful denominator is not municipal population but serviceable premises per kilometre of maintained plant, and no public figure supplies it here.

The central address at Rua Custódio Pires 69 is therefore more than a branding detail. Bizz's decision to retain a service point at the old Supernet location can preserve local knowledge and shorten simple equipment exchanges. Bizz also lists a broader regional presence that includes Morro do Pilar, Ferros, Passabém, Itambé do Mato Dentro and Antônio Dias. Shared purchasing, billing and upstream capacity across those towns can improve regional ISP economics, but a larger footprint can also lengthen dispatch distances if specialist crews are centralised.

The transition may reduce some costs. Bizz can consolidate transit, software, support and product procurement. It can move the former Plug address space into a wider routing environment and offer newer customer equipment. But scale only improves resilience if savings fund route diversity, spares and local response. If the same pole corridor, upstream carrier or small technician pool serves several towns, consolidation can turn a local dependency into a regional common point of failure.

No public record gives subscriber count, churn, average revenue, labour headcount, truck inventory or maintenance spending for the former Plug footprint. That makes a conventional financial assessment impossible. The more defensible view is physical: the sparse market raises the cost of every redundant kilometre and every standby crew, so claims of resilience deserve direct evidence rather than assumptions based on the Bizz brand.

Retail speeds rose; installed capacity remains undisclosed

Search-indexed copy from Supernet's legacy supernetcom.com.br address advertised tiers labelled 100, 200, 400 and 600 “MB,” described fibre access, and warned that maximum asymmetric speed could vary because of internal and external factors and the city or region. At the cut-off, that address redirected to supernet.bizzinternet.com.br, which returned no DNS answer, so the old plan copy is historical evidence rather than a surviving live order page. Its unit presentation was imprecise, but the intent was clearly consumer broadband rates rather than storage capacity. The indexed copy also listed the Santa Maria storefront and local support hours.

Bizz's Santa Maria de Itabira offer page now advertises fibre plans from 300 Mb/s to 1 Gb/s, while another passage says offers range from 100 Mb/s to 1 Gb/s. It promises Wi-Fi 6 equipment, installation within 48 hours, unlimited data and round-the-clock support. The page also claims full contracted bandwidth at peak time and 99.9% stability under an SLA.

None of those numbers measures network capacity. A 1 Gb/s retail tier is the maximum service rate for one access line under specified conditions. It does not show the aggregate backhaul serving Santa Maria, the capacity of an optical line terminal, the split ratio on a passive optical network, the uplink from a neighbourhood cabinet, or the amount reserved for business and public-sector customers. One gigabit sold to ten homes does not require ten gigabits of transit if their peaks differ; it also does not guarantee one usable gigabit when all ten are active.

The Bizz page needs particularly careful reading because it contains signs of reused city copy. In a section presented for Santa Maria, it displays a claim of more than 9,000 active customers in “Água Voa,” a place name that does not match the page. That mismatch makes the number unusable for Santa Maria. It also counsels against accepting the 99.9% and 15-minute support claims as measured local performance without the referenced SLA, a measurement interval and city-specific results. Marketing may accurately describe the intended service, but the page alone cannot verify it.

Installed capacity would require an inventory: active optical ports, PON generations, feeder wavelengths, radio channel widths, licensed or unlicensed spectrum, backhaul circuits and router interfaces. Lit capacity would require confirmation that optics and electronics are present. Powered capacity would require utility and backup-power status. Operational capacity would require successful service tests. Usable capacity would subtract contention, maintenance reserve, faults and policy limits. Sold or reserved capacity would then show how much remains available during the busy hour or a failure.

No published record completes even the first stage for Santa Maria.

The correct comparison is thus modest. Bizz's storefront offers a higher top access tier than the legacy Supernet page, and Bizz says the existing installation can remain. There is no public evidence that every old line can reach 1 Gb/s, that all neighbourhoods are fibre-only, or that the aggregate network has grown in proportion to the retail headline.

A 4 Gb/s event order is a stress case, not a capacity certificate

The Morro do Pilar event contract is the largest explicit service rate located in Plug's public record. Four gigabits per second for a temporary festival circuit is materially different from a one-gigabit residential offer. It implies a high-capacity path to the venue, suitable termination equipment, rapid installation and support during a crowded event. It also creates a deadline that exposes weak logistics: a delayed splice or missing optic cannot be repaired after the festival has ended.

But the 4 Gb/s figure occupies only one rung on the capacity ladder. The contract publication states what was ordered for specified 2024 dates. It does not include an acceptance test, traffic graph, packet-loss result or invoice confirming delivery. It does not say whether the rate was symmetric, dedicated, protected or shared. It does not reveal whether four one-gigabit links were combined, whether the venue already had fibre, or whether temporary equipment was removed afterward.

The figure therefore cannot be added to residential offers to estimate total network size. Nor can it establish current capacity after the 2026 transition. Its value is diagnostic: it identifies the kind of peak service the former operator was contracted to support and the failure conditions a successor may inherit. If the event path shared a single feeder or upstream with residents, event traffic could create contention. If it had a dedicated path, the service might be resilient locally but still share the regional backhaul.

Evidence-grade confirmation would include the 2024 acceptance record, interface counters during the event, the physical route to Campo Municipal Zanine Junior, power arrangements at the venue, and the circuit's disposition afterward. Without those records, 4 Gb/s is a contracted design requirement, not installed, lit, operational or currently usable capacity.

The failure chain starts at the premises and ends beyond town

A broadband line is only as available as the weakest active dependency between the customer and the rest of the internet. For the former Plug footprint, the chain can be divided into six layers. Each has a different owner boundary, and none is fully documented in public.

First is the customer premises. A fibre drop, optical network terminal, Wi-Fi router and local power must all work. On a wireless line, the outdoor or indoor radio also needs clear alignment and power. A Bizz promise that an installation remains active suggests those devices were retained, but it does not identify their owner or spare stock. A household power failure can look like a carrier outage; a failed router can look like a cut feeder.

Second is the access span. Aerial fibre attached to Cemig poles is exposed to vehicle strikes, falling branches, utility work and accidental cuts. A radio path can fail through equipment damage, interference, misalignment or loss of power at either end. The pole lists confirm an attachment context, not route diversity. If primary and standby fibres use the same poles, one incident can remove both.

Third is aggregation. Fibre customers depend on splitters, feeder cables, an optical line terminal and the site that houses it. Wireless customers depend on access points and a tower, rooftop or mast. There is no published inventory of these sites, no count of ports or sectors, and no map of which customers share them. A single failed optical card may affect one neighbourhood; a dead aggregation site can affect a town. Without site-to-customer mapping, the blast radius is unknown.

Fourth is power and environment. The network electronics need utility service, batteries and possibly a generator. Backup runtime depends on battery age, load, fuel and whether crews can reach the site. No public record states that Plug or Bizz has backup power in Santa Maria or Morro do Pilar, much less its tested duration. A 99.9% marketing claim cannot substitute for a site power inventory.

Fifth is regional transport. Historical Plug records named North's AS269096, and Bizz's current origin also reaches the wider internet through North in public routing views. A private second path may exist, but none is verified. A cut between Santa Maria and the regional core, an upstream router failure or a common North dependency could leave local fibre perfectly lit while external traffic fails.

Sixth is the public route and Bizz core. The March origin transition is visible in the control plane: the /22 is broadly visible from AS263652. Yet route visibility is not customer reachability or proof that account migration completed. A configuration error, attack, core failure or address-translation fault could interrupt service even when the access light remains green. The retired Plug IPv6 route adds another question: customers may have lost, changed or never used native IPv6, and current provisioning is undisclosed.

Those failure paths affect more than households watching video. Historical records show municipal and agricultural-office service, educational maintenance and temporary event connectivity. Remote workers, shops, payment terminals and public services in a small town may have mobile alternatives, but the quality and capacity of those alternatives are not established here. For any endpoint with no independent carrier, a common access or upstream failure is a complete outage.

Recovery depends on detection, diagnosis and authority. The technician needs to know whether the alarm belongs to legacy Plug equipment, Bizz aggregation or North transport; obtain access to the site; carry the correct optic or radio; and have authority to alter the configuration. A transition that preserves customer installations but fragments those rights can lengthen repair even when every company intends to help.

Local support labour is part of the network

Bizz presents support as a benefit of the transition. Its Supernet page moves customers to Bizz's application and support operation while retaining the former WhatsApp contact. The Santa Maria branch listing keeps a physical point in town, and the city offer advertises 24-hour assistance and a 15-minute WhatsApp response. Those are useful signs of an accessible service interface.

They are not evidence of field-repair capacity. A quick message response can precede a long dispatch. Round-the-clock remote support does not mean a splicer, climbing-qualified technician or radio specialist is stationed in Santa Maria overnight. A service centre can accept equipment without stocking the optical module needed at an aggregation site. No public page states crew count, on-call roster, training, vehicle availability, spare inventory or average restoration time by municipality.

The old company classifications and Morro do Pilar contract indicate that network maintenance was part of Plug's work. That makes knowledge transfer especially important. Small-provider technicians often carry route memory that is not obvious from a formal address: which pole span has been repeatedly damaged, which enclosure floods, which customer drop shares a crossing, which radio path needs realignment after severe weather, and which cabinet key opens which site. When an operator changes, preserving that local knowledge can matter as much as moving the BGP origin.

Bizz's regional scale can improve the labour equation if it gives the local branch access to more specialists and spares. It can worsen restoration time if every advanced fault waits for a crew dispatched from another town. The public presence list shows many nearby markets, but it does not disclose where repair teams are based or how competing incidents are prioritised.

A serious support assessment would separate four clocks: answer time, remote diagnosis time, dispatch time and restoration time. It would report them by town and fault class, with after-hours coverage and repeat-visit rates. It would also identify which entity owns each spare and which crews may work on pole attachments still recorded under Plug in Morro do Pilar. Until that evidence exists, local support should be treated as an operational dependency, not a slogan.

Control now changes by layer

The transition is easiest to understand when control is separated by infrastructure layer.

Layer	Best public evidence at 15 July 2026	What remains unresolved
Corporate identity	Plug's company registration is mirrored as active; Bizz is a separate active company identified by CNPJ 06.537.806/0001-08 on the federal transparency portal.	No public transaction document explains shares, assets or liabilities.
Customer interface	Bizz tells Supernet customers that service, plans and installations remain active and directs them to Bizz support.	Exact migration dates by account, invoice issuer and equipment title are not published.
IPv4 edge	Registro.br assigns the former Plug `/22` to Bizz and AS263652; RIPE sees Bizz originating it.	Internal addressing, carrier-grade translation and per-customer migration are unknown.
IPv6 edge	Plug's former `/32` is no longer registered or visible under AS264311.	Bizz's current IPv6 service for these customers is not established.
Pole access in Santa Maria	Current Cemig records name a Bizz-linked entity and no longer name Plug.	Attachment inventory, transfer date, cable title and route geometry are unknown.
Pole access in Morro do Pilar	Current Cemig records still name Plug.	Whether this is active plant, an administrative lag or a retained operation is unresolved.
Regional transport	Historical Plug and current Bizz routing views both expose North's AS269096 in the transport chain.	Physical diversity, backup carrier and tested failover are not public.
Field repair	Bizz retains a Santa Maria branch and support contact; Plug had documented maintenance duties.	Crew transfer, site access, spare ownership and restoration performance are unknown.

This layered view prevents two opposite errors. One is to call Plug a normal current ISP because its company remains active and old page material remains indexed. The other is to declare Plug entirely gone because AS264311 has no routes. The first ignores the routing and registry transfer. The second ignores the Morro do Pilar pole listing and the possibility of residual obligations.

It also clarifies who is affected by ambiguity. A subscriber needs one accountable support path even when Bizz, Plug, Cemig and North touch different layers. A public body needs to know whether an old service contract has been assigned. A field technician needs site and pole authority. An infrastructure buyer or regulator needs to distinguish legal entity, retail brand, network origin and physical asset owner rather than assuming one name controls all four.

What would settle the remaining operating questions

The evidence is sufficient to retire one claim: Plug should not be described as the current independent operator of AS264311. It is not sufficient to describe the replacement network's physical resilience. Ten disclosures would materially improve that assessment.

A dated customer and contract migration notice identifying the service provider, invoice issuer, effective date and treatment of existing equipment for Santa Maria and Morro do Pilar separately.
An asset schedule identifying feeder and distribution fibre, cabinets, optical line terminals, radios, towers or rooftops, customer equipment, vehicles and spares, with the owner and maintainer of each class.
A pole-attachment reconciliation explaining why the 2026 Cemig list moved Santa Maria from Plug to a Bizz-linked name while retaining Plug in Morro do Pilar.
A current serviceability map drawn from verified plant records, with explicit distinction between constructed fibre, wireless reach estimates and addresses actually ready for installation. It need not expose security-sensitive coordinates publicly, but an auditor should be able to test the claims.
Capacity records for access ports, splitter ratios, radio sectors, aggregation uplinks and regional backhaul, separating design, installed, lit, powered, operational, usable, sold and reserved capacity.
Upstream contracts and physical route descriptions showing whether a second path uses a different carrier, entrance, pole corridor and regional site. A BGP neighbour alone cannot establish diversity.
Backup-power inventories and recent load tests for every active aggregation and radio site, including battery runtime, generator coverage and fuel arrangements.
Fault records by cause and municipality, with answer, diagnosis, dispatch and restoration times, repeat visits and the availability of trained after-hours crews.
Acceptance evidence for the 2024 Morro do Pilar 4 Gb/s event service, including throughput, latency, loss, route and power results, plus whether the equipment remains available.
Current IPv6 provisioning evidence for migrated Supernet customers, explaining whether the retired 2804:25f0::/32 was replaced and how prefix continuity was handled.

These requests are proportionate to the claims at stake. They do not demand disclosure of customer identities or sensitive security details. They ask the operator to connect customer continuity to the physical and logical resources that make continuity possible.

Until then, Bizz's public pages show that it markets retail service in Santa Maria and publicly undertakes to keep former Supernet plans and installations active. The registry and routing data support a stronger conclusion that the old Plug public edge has ended. The gap lies between those conclusions: no public evidence confirms migration account by account or shows whether the access plant has route, power and labour redundancy sufficient to keep service working through a serious fault.

A visible routing transition with an unproven fallback

The March sequence is the defining fact in Plug Supernet's current profile. Registro.br changed the /22 to Bizz on 10 March. RIPE last saw AS264311 on 11 March and saw AS263652 carrying the address block from 12 March. Bizz told customers their plan and installation could stay. Current pole records place the Bizz-linked name in Santa Maria. Together, those are coherent public-edge and customer-facing transition signals, not proof that a legal, customer or physical-asset migration finished everywhere.

It is also incomplete as an infrastructure account. The public record does not prove a corporate acquisition, map a single current fibre route, count a single active radio, disclose one backhaul rate, or demonstrate one failover. Plug's residual appearance in Morro do Pilar prevents a blanket statement that every obligation moved. The disappearance of its IPv6 allocation and autonomous-system record prevents the opposite claim that it remains an independent routed provider.

For customers, the most reassuring evidence is direct: Bizz says the line stays active and keeps a local Santa Maria address. For resilience, the most important evidence is absent: independent physical paths, backup power, spare capacity and measured repair performance. In a municipality of about 10,700 people spread across nearly 600 square kilometres, those are not secondary details. They determine whether a preserved installation is a durable service or one cut, power failure or delayed dispatch away from isolation.

Plug Supernet's story in July 2026 is therefore not about a small ASN continuing unchanged. It is about a public network identity that ended while Bizz publicly undertook to carry access service forward. Bizz has made the continuity promise and now controls the former IPv4 edge. The unanswered questions include whether every account completed that transition, who owns and maintains the physical network, and whether its routes, power and field labour have more redundancy than the old public route ever showed.