AS220

AS220 is a legacy autonomous system number registered under ARIN to Air Force Systems Networking (ARIN organizational handle 7ESG), a U.S. Air Force / Department of Defense network entity. The handle name OOALC-HOSTNET-AS encodes the Ogden Air Logistics Center (OO-ALC) at Hill Air Force Base, Utah — an Air Force Materiel Command depot that performs maintenance, repair, and overhaul on aircraft (F-16, F-22, F-35, A-10), strategic missiles (Minuteman), and related systems. The ASN was registered with ARIN on 1988-08-12, making it one of the oldest entries in the ARIN-assigned 16-bit block (IANA 1-1876), and its registry record was last changed 2008-08-18. The key triage point for AS220 is that it is dormant today: RIPEstat reports it announces zero IPv4 and zero IPv6 prefixes and is seen by 0 of 327 (v4) and 0 of 324 (v6) RIS peers. CAIDA AS Rank places it at 79,459 with a singleton customer cone (1 ASN, 0 prefixes, 0 addresses) and all degree metrics (customer/peer/provider) at zero. It last appeared in the global BGP table on 2023-12-15 originating 137.241.0.0/16, and was first seen on 2000-08-18 announcing the same prefix. RPKI posture cannot be assessed because no prefix is currently announced. Administrative contact runs through DISA-Columbus (handle REGIS10-ARIN). No notable public abuse signal was found as of 2026-06-19 — consistent with a clean, dormant ASN held by a U.S. military operator outside civilian abuse-feed systems.

Operator

Air Force Systems Networking (ARIN org handle 7ESG; registrant address 501 East Moore Dr, Bldg 884 Rm 1100, Gunther Annex, Maxwell AFB, AL 36114) [Confirmed] — ARIN RDAP autnum/220, entity/7ESG

Country / RIR

US, ARIN [Confirmed] — RIPEstat abuse-contact-finder (authoritative_rir: arin); CAIDA country.iso US

Allocated

1988-08-12 (ARIN registry date from the autnum top-level registration event, NOT an IEEE date); last changed 2008-08-18 [Confirmed] — ARIN RDAP autnum top-level events

Org status

active ARIN registration assigned to Air Force Systems Networking (org 7ESG); registry last changed 2008-08-18; BGP routing ceased December 2023 [Confirmed] — ARIN RDAP, bgp.he.net

Contacts

admin/abuse via DISA-Columbus (handle REGIS10-ARIN), disa.columbus.ns.mbx.arin-registrations@mail.mil, +1-844-347-2457 ext.2 [Confirmed] — ARIN RDAP, RIPEstat abuse-contact-finder

Website

Unknown — no public operator website for this ASN; parent installation is Ogden Air Logistics Complex, Hill AFB [Confirmed null] — ARIN RDAP entity/7ESG

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-19 — no Spamhaus SBL/ASN-DROP, no NANOG abuse threads, no AbuseIPDB ASN page, not on CleanTalk; several live feeds returned 403 so absence is supporting signal not confirmed clear

Network & routing

Network type

U.S. military / DoD internal network; host-network segment for the Ogden Air Logistics Center (OO-ALC) at Hill AFB, Utah; not a commercial ISP, no public peering [Confirmed] — ARIN RDAP, bgp.he.net/AS220

Size

dormant — 0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes announced; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — RIPEstat routing-status / CAIDA AS Rank (2026-06-19)

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 RIPEstat/CAIDA [Confirmed]. Third-party (bgp.he.net) reports a single observed peer AS367 (U.S. Department of Defense) [Likely] — bgp.he.net/AS220

Historical routing

last seen in global BGP 2023-12-15 originating 137.241.0.0/16; first seen 2000-08-18 with the same prefix [Confirmed] — RIPEstat routing-status

RPKI

not assessable — AS220 announces no prefixes, so there are no ROAs to validate [Unknown] — RIPEstat rpki-validation (skipped, no prefix); A5 reports zero ROAs [Likely]

Notable usage

host-network segment for OO-ALC (Hill AFB, UT); one of several Air Force Systems Networking ASNs for Air Logistics Center segments (cf. AS221 WRALC, AS222 SMALC) [Likely] — ARIN RDAP, globalsecurity.org/wmd/agency/oo-alc.htm, bgp.he.net

Analyst note

Encountered as a dormant legacy DoD/USAF ASN; WHOIS resolves to Air Force Systems Networking with DISA-Columbus admin contact. Clean, inactive ASN, no current originations. Org/installation attribution to the 754th Electronic Systems Group (A5 angle) is single-source and tagged Likely.