CEREMA Centre d'études et d'expertise sur les risques, l'environnement, la mobilité et l'aménagement

CEREMA Centre d'études et d'expertise sur les risques, l'environnement, la mobilité et l'aménagement holds dormant AS211835 with no active BGP announcements. The organization's presence is limited to RIPE NCC and RDAP registry entries. The name suggests a French public research institution, but this is not independently confirmed. Monitoring focuses on any activation or registry change that would turn a dormant record into an active routing entity or remove it entirely. Key gaps include lack of a website, PeeringDB profile, or named contacts.

CEREMA Centre d'études et d'expertise sur les risques, l'environnement, la mobilité et l'aménagement

CEREMA Centre d'études et d'expertise sur les risques, l'environnement, la mobilité et l'aménagement holds dormant Autonomous System 211835 in the RIPE NCC registry with no active BGP announcements. The name suggests a French public studies institution, but no independent evidence confirms this. The organization has no observable network operations, website, PeeringDB profile, or named contacts, limiting its public profile to a registry entry that may activate or disappear without warning.

Why It Matters

If AS211835 begins announcing IP prefixes, CEREMA could influence internet routing paths and become a point of operational dependency. Even in dormancy, the unexplained assignment of an ASN to an organization with no public operational footprint raises questions about unannounced network planning, resource hoarding, or administrative artefact. Changes to the registry entry would directly alter the intelligence baseline for this subject.

What Public Sources Show

CEREMA Centre d'études et d'expertise sur les risques, l'environnement, la mobilité et l'aménagement is the registered holder of Autonomous System 211835 in the RIPE NCC registry. The organization announces no IP prefixes and carries no internet traffic. While the name suggests a French public research institution, no independent evidence confirms this beyond the registry entry.

The dormant ASN represents a latent infrastructure vector that requires monitoring because its activation would immediately insert a new entity into global BGP routing tables.

Three official registry sources substantiate the assignment and dormancy. RIPEStat AS overview data for AS211835 lists the organization as holder. An RDAP autnum query returns registration details without operational contacts. A query to the announced prefixes endpoint returns an empty list, confirming no active BGP visibility.

No other public records, such as a corporate website, PeeringDB profile, or government directory listing, corroborate the organization's functions, personnel, or intentions for the resource.

The only control surface is the RIPE NCC registry record. Authorized individuals can modify the ASN's description, status, or point of contact through the maintaining LIR portal. No operational infrastructure—website, public-facing network, or peering agreements—is observable. The ASN is administratively assigned but serves no routing purpose at present.

Any change to the registry entry, such as adding a contact or updating the holder name, would directly alter the public profile and the intelligence baseline.

Activation of AS211835 would immediately impact internet routing. The first prefix announcement would insert the organization into global BGP tables, creating dependency relationships with upstream providers and peers. This transition would expose the entity to route hijacks, leaks, and misconfiguration risks. Conversely, a registry update that transfers or deletes the ASN would remove a latent infrastructure vector from monitoring radars.

The current absence of announcements is itself a signal that warrants continued observation.

Watchpoints focus on registry and routing shifts. The first BGP announcement from AS211835 would signal operational use and require rapid analysis of interconnection policy and security posture. Changes to the ASN's organization handle, contacts, or status in the RIPE NCC database could indicate a transfer, reclamation, or shift in administrative responsibility.

Discovery of a matching official website, corporate filing, or government directory entry could confirm the institution's real-world identity and clarify its intent.

Major uncertainty surrounds the institution's true nature. The registry name suggests a French public body focused on risks, environment, mobility, and planning, but no operational, commercial, or administrative detail is publicly available. The purpose of the ASN assignment is unknown—whether it is held for future use, belongs to a cancelled project, or is an administrative artefact. No named contacts are listed, making incident response or verification impossible.

These gaps limit the profile to registry-context monitoring.

For network operators and infrastructure analysts, CEREMA's dormant ASN is a watch item. The resource could become an active routing entity at any time, or it could disappear from registries. Monitoring the three public registry sources for changes ensures that any transition is detected early. Until further evidence emerges, the assessment remains confined to the administrative fact of ASN ownership without operational network activity.

Operating Surface

The organization's observable role is administrative: it controls the registration of AS211835 in the RIPE NCC registry. There is no evidence of network operation, peering, connectivity services, or any other internet infrastructure activity. The ASN is administratively held but unused, making the organization a dormant resource holder with no current routing influence.

Monitoring this dormant ASN matters because its activation would immediately insert the organization into global BGP routing tables, creating new dependency relationships and exposure to route hijacks or leaks. Conversely, a reassignment or deletion would remove a future infrastructure concern. The current absence of announced prefixes is itself a signal worth tracking for network operators and infrastructure analysts.

Watchpoints

The strategic significance of CEREMA lies in its potential to transition from a dormant registry entry to an active routing entity. While the current dormancy presents no immediate risk, the lack of transparency around the ASN's purpose and the institution's identity creates uncertainty that could confound routing security analysis.

As a French entity with a name suggesting public-sector expertise, any future activation might align with government digital infrastructure initiatives, warranting careful monitoring of registry changes and any precursor signals such as website launch or PeeringDB registration.

Observable changes that would alter the assessment include: first BGP announcement from AS211835; modifications to the RIPE NCC organization handle or technical contacts; filing or publication of an official website, corporate registration, or PeeringDB entry by the CEREMA institution; RIPE NCC registry activity indicating transfer or deletion of the ASN. A shift from dormancy to active routing would require immediate re-evaluation of the subject's operational role and dependencies.

Key evidence gaps are the absence of a public website for the organization, no PeeringDB profile, no named contacts in the ASN registry record, and no independent confirmation of the organization's real-world mandate. Without these, the profile cannot confirm the institution's identity, its intent for the ASN, or its operational capabilities. Future collection should target French government directories, official publications, and any available corporate filings that match the name.

Sources

• Internet registry record - Public-source identity and registry context for CEREMA Centre D'etudes Et D'expertise Sur Les Risques L'environnement La Mobilite Et L'amenagement.
• Registry RDAP / WHOIS record - evidence-led registry, routing, or network context for CEREMA Centre D'etudes Et D'expertise Sur Les Risques L'environnement La Mobilite Et L'amenagement.
• Internet registry record - evidence-led routing visibility context for CEREMA Centre D'etudes Et D'expertise Sur Les Risques L'environnement La Mobilite Et L'amenagement via AS211835.