AS216

AS216 is a legacy autonomous system number registered under ARIN to Air Force Systems Networking (AFSN), a unit of the United States Air Force / Department of Defense. The ARIN registry name is LMSC-HOSTNET-AS, and the registrant org handle is 7ESG, addressed at 501 East Moore Dr, Bldg 884 Rm 1100, Gunther Annex, Maxwell AFB, AL 36114. Administrative, technical, and abuse contact runs through DISA-Columbus (handle REGIS10-ARIN) at 300 North James Road, Whitehall, OH 43213. The key triage point for AS216 is that it is effectively dormant today: every routing source consulted (RIPEstat RIS, CAIDA AS Rank, bgp.tools, Hurricane Electric) agrees it announces zero IPv4 and zero IPv6 prefixes, is seen by zero of ~327 RIS peers (v4) and zero of ~324 RIS peers (v6), and has zero observed upstreams, peers, or customers. Its CAIDA AS rank of 79,459 sits near the bottom of the global ranking, reflecting complete routing inactivity, and its customer cone is a singleton (the ASN itself, 0 prefixes, 0 addresses). The ASN was registered 1988-07-18 — one of the earlier ASNs assigned to the U.S. Air Force — and the ARIN record was last changed 2008-08-18. The autnum status is administratively active even though no IP space is routed. RPKI posture cannot be assessed because there are no active originations and therefore no ROAs. No notable public abuse signal was found as of June 2026 — not in Spamhaus ASN-DROP (queried directly), AbuseIPDB, NANOG archives, or general threat feeds — consistent with a clean, dormant ASN held by a U.S. government / military operator. The absence of abuse reports is expected: with no routed IPs there is no live attack surface to abuse or report.

Operator

Air Force Systems Networking (AFSN), a unit of the U.S. Air Force / DoD; ARIN registrant org handle 7ESG, Maxwell AFB, AL [Confirmed] — https://rdap.arin.net/registry/autnum/216, https://rdap.arin.net/registry/entity/7ESG

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/216, RIPEstat abuse-contact-finder (authoritative_rir: arin)

Allocated

1988-07-18 (ARIN autnum top-level registration event, NOT an IEEE date — IEEE publishes no ASN registration dates); last changed 2008-08-18 [Confirmed] — ARIN RDAP autnum top-level events

Org status

active U.S. federal government / military entity; parent U.S. Air Force (Department of the Air Force, DoD); ARIN registration administered via DISA-Columbus (Defense Information Systems Agency), handle REGIS10-ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/216

IANA block

IANA 16-bit AS Numbers Registry, block 1-1876, assigned by ARIN [Confirmed] — RIPEstat as-overview

Contacts

disa.columbus.ns.mbx.arin-registrations@mail.mil; +1-844-347-2457 ext 2; admin/abuse via DISA-Columbus, 300 North James Road, Whitehall, OH 43213 [Confirmed] — https://rdap.arin.net/registry/autnum/216, RIPEstat abuse-contact-finder

Website

Unknown — no official public operator website for AFSN / AS216 appears in ARIN, PeeringDB, or BGP tooling; AFSN is a U.S. government internal network entity [Unknown] — https://bgp.he.net/AS216, https://www.peeringdb.com/org/20118

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-19 — not in Spamhaus ASN-DROP (queried directly), AbuseIPDB (no page), NANOG seclists archive, or general threat feeds; dormant ASN under a U.S. government / military operator; the dormant/unrouted status is a neutral finding, not a risk indicator

Network & routing

Network type

U.S. military / government internal network (AFSN data communications infrastructure for the U.S. Air Force); not a commercial ISP or transit provider; AS216 is legacy/inactive [Confirmed] — https://rdap.arin.net/registry/autnum/216, https://solutions71.com/air-force-systems-networking-afsn/

Size

dormant — 0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — RIPEstat routing-status / CAIDA AS Rank (2026-06)

Routing/peering

NOT announced — 0 RIS peers seeing it (0/327 v4, 0/324 v6); CAIDA degree total 0 (customer 0, peer 0, provider 0); no upstreams or peers visible in any source; no published peering policy [Confirmed] — RIPEstat routing-status, https://api.asrank.caida.org/v2/graphql (AS216), https://bgp.tools/as/216

RPKI

not assessable — AS216 announces no prefixes, so there are no ROAs to validate (RIPEstat rpki-validation requires at least one announced prefix) [Confirmed] — RIPEstat rpki-validation

Notable usage

AS216 (LMSC-HOSTNET-AS) is one of the earlier ASNs assigned to the U.S. Air Force (registered 1988); the name likely references a Logistics Management Systems Command lineage [Likely on name etymology]; AFSN broadly supports U.S. Air Force data communications, with no routes currently in the global BGP table

[Confirmed on routing status] — https://rdap.arin.net/registry/autnum/216, https://bgp.tools/as/216

Related ASNs

PeeringDB lists the parent org with other ASNs (e.g. AS65, AS123, AS175, AS221, AS301), but not AS216 [Likely per third-party DB] — https://www.peeringdb.com/org/20118

Analyst note

Encountered as a dormant legacy ASN registered to a U.S. Air Force / DoD entity; WHOIS resolves to Air Force Systems Networking, but no IP space is routed under AS216. Clean, inactive ASN. Allocated date taken strictly from the autnum top-level registration event (1988-07-18); entity-level dates (org 7ESG 2008-06-05, contact REGIS10-ARIN 2009-06-24) are decoys and excluded.