AS211

AS211 is a legacy autonomous system number registered under ARIN to the Rome Air Development Center (RADC), a U.S. Air Force research laboratory at Griffiss Air Force Base in Rome, New York. Its low integer value reflects an early allocation — the ARIN autnum top-level registration event is dated 1988-07-07, placing AS211 among the earliest assigned ASNs and consistent with RADC's role as an ARPANET-connected military research node engaged in early TCP/IP and network-security work. RADC was renamed Rome Laboratory in 1991 and absorbed into the Air Force Research Laboratory Information Directorate (AFRL/RI) in October 1997; the original registrant organization therefore no longer exists under that name, though AFRL/RI remains active in Rome, NY. The key triage point for AS211 is that it is effectively dormant today: every routing source consulted (RIPEstat routing-status, announced-prefixes, bgp.he.net, bgp.tools, PeeringDB) agrees it announces zero IPv4 and zero IPv6 prefixes, has zero visible BGP peers, zero upstreams, and zero observed neighbours as of June 2026. The only historical routing trace is a brief appearance of 168.0.228.0/22 between 2017-07-18 and 2017-08-11 (about three weeks); nothing has been seen since. PeeringDB lists an "Open" policy as a legacy artifact, but no exchanges or facilities are configured. ARIN marks the ASN "active" but the abuse contact is a placeholder (nobody@example.com) with no known POC. No notable public abuse signal was found as of June 2026 — Spamhaus, AbuseIPDB, FraudGuard, and the community bad-ASN blocklist returned nothing for AS211 — consistent with a clean, dormant, non-routing legacy military ASN.

Operator

Rome Air Development Center (RADC), U.S. Air Force, Griffiss AFB, Rome, NY (ARIN org handle RADC-2); renamed Rome Laboratory (1991), absorbed into AFRL/RI (1997) [Confirmed] — ARIN RDAP autnum/211, en.wikipedia.org/wiki/Rome_Laboratory

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP autnum/211, RIPEstat abuse-contact-finder (authoritative_rir: arin)

Allocated

1988-07-07 (ARIN autnum top-level registration event — a first-party RIR registry fact, NOT an IEEE date); last changed 2024-09-09 [Confirmed] — ARIN RDAP autnum/211 top-level events

Org status

U.S. federal government / DoD. RADC itself was disbanded/renamed; successor AFRL/RI is active in Rome, NY. The AS211 registration has not been transferred or retired in ARIN (ARIN status: active; last changed 2024-09-09) [Confirmed] — ARIN RDAP autnum/211, afrl.af.mil/RI.aspx

Contacts

abuse contact nobody@example.com (placeholder; ARIN notes no known POC, unvalidated since 2025-02-08). Technical POC Scott W. Rogers (SWR3-ARIN), Pikesville MD — a validated individual POC apparently unrelated to the original DoD registrant [Confirmed] — ARIN RDAP entity/CKN23-ARIN, entity/SWR3-ARIN

IANA block

AS 1–1876, "Assigned by ARIN," IANA 16-bit Autonomous System Numbers Registry [Confirmed] — RIPEstat as-overview (resource=211)

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-19 — not in Spamhaus, AbuseIPDB, FraudGuard, the bountyyfi/bad-asn-list community blocklist, or NANOG archives; Spamhaus/AbuseIPDB/FraudGuard returned HTTP 4xx (not queryable), so null is inferred from non-routing status and corroborated by the blocklist check that did return data

Network & routing

Network type

U.S. Department of Defense / Air Force military research network (government/defense); legacy and currently inactive [Confirmed] — ARIN RDAP autnum/211, bgp.he.net/AS211, peeringdb.com/asn/211

Size

dormant — 0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes; 0 IPs currently routed [Confirmed] — RIPEstat routing-status / announced-prefixes (resource=211, 2026-06)

Routing/peering

NOT announced — 0 of 327 RIS v4 peers and 0 of 323 RIS v6 peers seeing it; 0 observed neighbours; no upstreams or peers visible in any source [Confirmed]. PeeringDB lists policy "Open" with all protocol options disabled — a legacy artifact, not active peering [Confirmed] — peeringdb.com/asn/211

RPKI

not assessable — AS211 announces no prefixes, so there are no ROAs to validate (RPKI validation skipped, no prefix supplied) [Unknown] — RIPEstat rpki-validation (skipped)

Historical routing

only trace is 168.0.228.0/22 (~1024 IPs) seen 2017-07-18 to 2017-08-11 (~3-week window); no routing activity since [Confirmed] — RIPEstat routing-status

Notable usage

RADC was an early ARPANET-connected USAF research site involved in early TCP/IP and FTP development; AS211's 1988 allocation reflects its deep involvement in early Internet infrastructure. Renamed Rome Laboratory (1991), merged into AFRL/RI (1997, C4I/cyber research) [Confirmed for evolution; Likely for specific early-FTP detail, single-source] — multicians.org/site-radc.html, en.wikipedia.org/wiki/Rome_Laboratory

Analyst note

Dormant/legacy ASN registered to a historically significant USAF research facility (RADC / Rome Laboratory). ARIN marks it active, but it is completely dark — 0 announcements, 0 peers, 0 cone. The org-entity RADC-2 nested registration date (1988-01-04) is a decoy; the allocated_date is the autnum top-level event (1988-07-07).