Commune de Lyon

Commune de Lyon (Ville de Lyon) operates AS211957 with a single IPv4 prefix and a digital sovereignty program that replaces Microsoft 365 with open-source tools for 5,000+ municipal staff. The evidence confirms civic scale, routing footprint, and program structure but does not map resident services to the ASN or verify migration completion. Watch for routing changes, program governance shifts, and service-to-AS mapping. This dual profile serves infrastructure monitoring and public-sector IT policy tracking.

Commune de Lyon

Commune de Lyon, operating as Ville de Lyon, is the municipal authority for France’s third-largest city, serving over 520,000 residents. It maintains a small internet routing footprint via AS211957 and a single IPv4 prefix, while pursuing an ambitious digital sovereignty program that replaces proprietary office tools with open-source alternatives, regional hosting, and mutualized public-sector platforms.

Why It Matters

Changes in AS211957 routing posture can alter the technical resilience assessment of a city serving half a million people; shifts in the TNO program’s governance, funding, or software stack can affect municipal service continuity, vendor market dynamics, and the perceived viability of open-source public-sector alternatives across Europe.

What Sources Show

The Ville de Lyon, representing France’s third-largest municipality with over 520,000 residents, operates a small but monitorable internet presence through AS211957 and a single IPv4 prefix. At the same time, it is executing one of Europe’ most ambitious municipal digital sovereignty programs, replacing proprietary office tools with open-source alternatives and mutualized infrastructure. This dual surface makes Lyon a bellwether for public-sector network resilience and IT independence.

The network surface consists of AS211957, allocated in January 2021, announcing the 185.235.8.0/24 range with 256 IPv4 addresses. AS30781 Free Pro SAS is the visible upstream; import/export records also reference AS5410 and AS43100. IPIP data shows ROA signed and valid and IRR valid for the prefix, but no IPv6 routes appear in registry or routing views.

This footprint creates an observable position where routing changes or security lapses could directly affect municipal reachability.

On the digital sovereignty front, the City of Lyon announced in June 2025 the Territoire Numérique Ouvert (TNO) initiative, a virtual office platform built with inter-municipal partners SITIV and Métropole de Lyon. Funded by a €2 million ANCT grant and support from Plan France Relance, TNO uses open-source components including Jitsi, OnlyOffice, and Nextcloud, hosted in regional datacenters.

The goal is a near-complete migration from Microsoft 365, with initial deployment reaching several thousand agents across multiple local authorities.

The operating surface extends beyond routing. Ville de Lyon acts as data controller for municipal processing, with formal commitments to security, minimization, and subcontractor controls. The lyon.fr legal notice identifies Stratis for website maintenance, while the TNO program redirects avoided Microsoft subscription costs toward change management and support—first-year operating cost estimated at €368,000.

These choices give the city practical authority over staff workflows, vendor relationships, and public data handling.

What makes Lyon material is the interplay of these surfaces. Routing posture changes can shift the technical risk assessment for a city of half a million. Meanwhile, the TNO program’s success or failure influences procurement strategies across European public administrations. A retreat from open-source tools or a disruption in regional hosting would signal that even well-funded municipalities struggle to escape proprietary ecosystems, altering the perceived viability of digital sovereignty models.

Evidence boundaries are important. While AS211957 is clearly registered to Commune de Lyon, public sources do not confirm which resident-facing services run on that network. The official migration audit for early 2026 has not been located, leaving the exact completion status uncertain. Live routing datasets also require refresh; BGP announcements, RPKI state, and IPv6 origination should be validated close to publication because routing observations can diverge from static registry records.

Key watchpoints include any change in AS211957 upstream connectivity or route security, public confirmation of office-suite migration milestones, shifts in TNO governance or hosting partnerships, and the publication of service-specific data protection notices. For infrastructure readers, Lyon offers a concrete case of a mid-sized municipality applying internet-number resources while pursuing structural IT independence—worth monitoring as a live experiment in civic technology sovereignty.

Operating Surface

The institution delivers municipal public services and governs digital tools for more than 5,000 staff. In internet infrastructure evidence, it appears as the organisation behind AS211957 and the 185.235.8.0/24 prefix, though no resident-facing services are confirmed to run on that network. Its broader role includes data controller responsibilities, procurement of open-source software, and leadership of the Territoire Numérique Ouvert (TNO) collaboration suite with regional partners.

The municipality is tracked because AS211957 creates a monitorable network surface where routing security and upstream changes directly affect municipal internet reachability, and the TNO sovereignty program provides a replicable model for reducing proprietary lock-in in public administration—carrying both cost-efficiency gains and new partner-dependency risks that infrastructure and policy readers need to understand.

Watchpoints

Lyon's dual signal as a network operator and a large-scale open-source adopter makes it a strategic indicator for municipal infrastructure resilience and European public-sector digital sovereignty. Changes in AS211957 routing or TNO program stability could influence broader perceptions of open-source viability in government.

Monitor AS211957 BGP announcements, upstream relationships, route security, IPv6 progress; track TNO deployment milestones, partner governance, and cost trajectories. Any shift away from open-source or regional hosting would signal strategic reversal.

Key gaps include direct service-to-AS mapping, post-target migration audit, live routing and RPKI/IRR/ASPA status, and named technical contacts for AS211957. Additional public records on TNO vendor contracts and hosting agreements would strengthen the assessment.

Sources

• Registry RDAP / WHOIS record - public-source identity and registry context for communedelyon.
• Registry RDAP / WHOIS record - RIPE derived WHOIS mirror identifies AS211957 as communedelyon, organization Commune De Lyon, country France, with import and export entries involving AS5410, AS30781, and AS43100.
• ipgeolocation.io - IPGeolocation's AS211957 page lists COMMUNE DE LYON, AS name communedelyon, registry RIPE, allocation date 2021-01-22, one IPv4 route, and 185.235.8.0/24 as the IP range.
• radar.cloudflare.com - Cloudflare Radar lists AS211957 as communedelyon in France and provides a routing view for the AS, supporting current public routing visibility.
• lyon.fr - The official lyon.fr legal page states that lyon.fr is the official site of the Ville de Lyon and lists municipal postal contact details at 1 Place de la Comedie, 69205 Lyon Cedex 01.
• lyon.fr - The City of Lyon's 23 June 2025 announcement describes a major digital tools transformation, including Territoire Numerique Ouvert, regional hosting, a 2 million euro ANCT grant, and progressive replacement of Microsoft Office with free office tools.
• numerique360.banquedesterritoires.fr - Banque des Territoires' 10 March 2026 case study says Lyon refused Microsoft 365, built a free and mutualized collaborative suite with Metropole de Lyon and SITIV, and identifies 5,000 city office workstations as in scope.
• insee.fr - INSEE's 2026 territory comparator lists Commune de Lyon, code 69123, with population of 520,774 in 2022.
• lyon.fr - Says Mairie de Lyon is the data controller, describes municipal personal-data processing for inhabitants, users, agents, elected officials, and partners, and sets out security, minimization, subcontractor, and transfer commitments.
• ipinfo.io - Lists AS211957 as COMMUNE DE LYON in France, registry ripe, allocated 2021-01-22, with 185.235.8.0/24 as the IPv4 range, 256 IPv4 addresses, zero known IPv6 addresses, and AS30781 Free Pro SAS as visible peer and upstream.
• territoirenumeriqueouvert.fr - Presents Territoire Numerique Ouvert as a virtual office for and by local authorities, with identity, signature, safe-storage, communication, citizen-relationship, e-learning, dematerialization, and document-sharing functions, carried by SITIV with Ville de Lyon and Metropole du Grand Lyon among the project partners and Plan France Relance support.
• sitiv.fr - Says the suite was developed with SITIV and Metropole de Lyon using open-source tools including Jitsi, OnlyOffice, and Nextcloud, hosted in regional datacenters, supported by a 2 million euro ANCT grant, and already used by several thousand agents in 7 local authorities according to SITIV's July 2025 page.