AS379

AS379 is a legacy autonomous system number registered under ARIN to Air Force Systems Networking — a U.S. Department of Defense / United States Air Force network resource administered by the Defense Information Systems Agency (DISA). The ARIN registrant org (handle 7ESG) lists an address at 501 East Moore Dr., Bldg 884 Rm 1100, Gunter Annex, Maxwell AFB, AL 36114, while the abuse, administrative, and technical contact routes through DISA-Columbus (300 North James Road, Whitehall, OH 43213; disa.columbus.ns.mbx.arin-registrations@mail.mil). The ASName AFCONC-BLOCK1-AS and the contiguous low-number range (AS379 sits inside a block extending to roughly AS508) mark it as one of the earliest ASN allocations, consistent with DoD/Air Force internal networking dating to the origins of ASN assignment. The key triage point for AS379 is that it is effectively dormant today: RIPEstat and CAIDA agree it announces zero IPv4 and zero IPv6 prefixes, is seen by zero RIS peers (0/323 v4, 0/322 v6), has zero upstreams, zero peers, and a singleton customer cone (the ASN itself, 0 prefixes, 0 addresses). RDAP status remains "active," but BGP visibility shows nothing announced since 55.23.0.0/16 was last seen on 2017-06-21 (first seen announcing 199.251.147.0/24 on 2001-09-26). Its CAIDA AS rank of 79,459 sits near the bottom of the global ranking, reflecting complete routing inactivity. No PeeringDB record exists (API 404). RPKI posture is not assessable — there are no active originations and therefore no ROAs. No notable public abuse signal was found as of 2026-07-02 — not in Spamhaus ASN-DROP nor in general web / BGP-hijack tracker searches — consistent with a clean, dormant military ASN whose restricted public visibility reflects operational-security policy rather than reputation.

Operator

Air Force Systems Networking (U.S. DoD / U.S. Air Force; ARIN OrgId 7ESG; administered by DISA) [Confirmed] — ARIN RDAP (https://rdap.arin.net/registry/autnum/379)

Country / RIR

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

Allocated

1989-08-04 (ARIN registry date from the autnum TOP-LEVEL registration event, NOT an IEEE date — IEEE publishes no ASN registration dates; the nested entity/org events of 2008-06-05 and 2009-06-24 are decoys); last changed 2008-06-06

[Confirmed] — ARIN RDAP autnum top-level events (https://rdap.arin.net/registry/autnum/379)

Org status

active per ARIN RDAP; U.S. Air Force network resource administered by DISA (Gunter Annex, Maxwell AFB, AL; DISA-Columbus, OH) [Confirmed] — ARIN RDAP (https://rdap.arin.net/registry/autnum/379)

Contacts

abuse/admin/tech via DISA-Columbus — disa.columbus.ns.mbx.arin-registrations@mail.mil, +1-844-347-2457 ext.2; registrant HQ 501 East Moore Dr., Bldg 884 Rm 1100, Gunter Annex, Maxwell AFB, AL 36114 [Confirmed] — ARIN RDAP (https://rdap.arin.net/registry/autnum/379)

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-02 — not in Spamhaus ASN-DROP, nor in general web / BGP-hijack tracker (BGPStream, Qrator, Cloudflare Radar) searches; NANOG archive negative is unverified (no site: filter available) so treated as inconclusive; dormant/unrouted network limits abuse surface

Network & routing

Network type

U.S. government / military network (DoD, U.S. Air Force / AFNET); not a commercial ISP, hosting, or content network; AS379 is legacy/inactive [Confirmed] — ARIN RDAP; ipinfo.io/AS379

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 (https://stat.ripe.net/AS379) / CAIDA AS Rank (https://asrank.caida.org/asns/379)

Routing/peering

NOT announced — 0 RIS peers seeing it (0/323 v4, 0/322 v6); CAIDA degree total 0 (customer 0, peer 0, provider 0); RIPEstat observed_neighbours 0; no public peering policy published; no PeeringDB record (API 404)

[Confirmed] — RIPEstat (https://stat.ripe.net/AS379), CAIDA (https://asrank.caida.org/asns/379), peeringdb.com/api/net?asn=379

RPKI

not assessable — AS379 announces no prefixes, so there are no ROAs to validate (RIPEstat rpki-validation requires a prefix; none applicable) [Unknown] — RIPEstat rpki-validation (skipped, no prefix)

Notable usage

part of a contiguous historical ASN block (AS379 through ~AS508) allocated to Air Force Systems Networking for DoD/Air Force internal networking since the earliest ASN allocations; no specific public-facing services documented [Likely] — ipinfo.io/AS379, ipgeolocation.io/browse/asn/AS379

Historical routing

first seen announcing 199.251.147.0/24 on 2001-09-26; last seen announcing 55.23.0.0/16 on 2017-06-21; not announced since [Confirmed] — RIPEstat routing-status (https://stat.ripe.net/AS379)

Analyst note

Encountered as a dormant legacy military ASN registered to Air Force Systems Networking via DISA; RDAP status is "active" but no prefixes have been visible in BGP since 2017. The absence of community/peering presence reflects deliberate DoD operational security, not a defunct or ill-reputed operator. Clean, inactive ASN.