AS548

AS548 is a legacy ARIN-registered autonomous system held by the United States Air Force under the registrant name "Air Force Systems Networking" (ARIN org handle 7ESG), with a registered address at 501 East Moore Drive, Building 884, Room 1100, Gunther Annex, Maxwell AFB, Alabama. The autnum's top-level RDAP registration event dates the allocation to 1989-11-08, distinct from — and not to be confused with — the newer registration dates carried by the record's nested contact/registrant entities (2008–2009), which describe when those entity records were created, not when the ASN itself was allocated. Administrative, abuse, and technical contact routes through a DISA-Columbus "Registration" group rather than a unit-level NOC. Operationally, AS548 is completely dormant: RIPEstat and CAIDA independently agree it announces zero IPv4 and zero IPv6 prefixes, is visible to none of 325 IPv4 or 322 IPv6 RIS route-collector peers, has a singleton customer cone (itself only), zero upstreams, zero peers, and zero customers, and carries no PeeringDB profile. RPKI posture cannot be assessed because there are no live announcements to validate against ROAs. No notable public abuse signal was found. RDAP marks the underlying registration record as active despite the total absence of BGP presence.

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, United States [Confirmed] — https://rdap.arin.net/registry/autnum/548

Country / RIR

US, ARIN [Confirmed] — https://stat.ripe.net/data/as-overview/data.json?resource=548

Allocated

1989-11-08 (ARIN RDAP autnum TOP-LEVEL registration event; distinct from decoy entity-level registration dates on the REGIS10-ARIN contact [2009-06-24] and 7ESG registrant org [2008-06-05] entities, which are NOT the ASN's allocation date); last changed 2009-05-11 [Confirmed, cross-checked by two independent research angles] — https://rdap.arin.net/registry/autnum/548

Contacts

REGIS10-ARIN "Registration" group (DISA-Columbus), 300 North James Road, Whitehall, OH 43213; disa.columbus.ns.mbx.arin-registrations@mail.mil; +1-844-347-2457 ext 2 [Confirmed] — https://rdap.arin.net/registry/entity/REGIS10-ARIN

Org status

active (ARIN RDAP record status) [Confirmed] — https://rdap.arin.net/registry/autnum/548

Website

Unknown — no dedicated public operator site exists for this internal DoD network [Confirmed absence]

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-11 across Spamhaus threat-intel resources, AbuseIPDB, and NANOG mailing-list archives; no AS548-specific hits surfaced

Network & routing

Network type

Government/Military — U.S. Department of Defense (Air Force) internal networking, administered under ARIN org 7ESG [Confirmed] — https://rdap.arin.net/registry/entity/7ESG

Routing status

fully dormant — 0 announced IPv4 prefixes/addresses, 0 IPv6 prefixes; 0 of 325 RIS peers see any v4 route, 0 of 322 see any v6 route; singleton customer cone (1 ASN, 0 prefixes, 0 addresses); 0 upstreams, 0 peers, 0 customers; CAIDA ASRank 79,459, seen=false, cliqueMember=false

[Confirmed] — https://stat.ripe.net/data/routing-status/data.json?resource=548, https://api.asrank.caida.org/v2/restful/asns/548

RPKI

not assessable — no live announcements exist to validate against ROAs [Confirmed] — https://stat.ripe.net/data/rpki-validation/data.json?resource=548

Peering

no public peering policy found; no PeeringDB entry (queried, HTTP 404) [Confirmed absence] — https://www.peeringdb.com/asn/548

Notable usage

internal USAF systems networking under org 7ESG; a web-search summary suggested a correspondence between the "7ESG" org handle and the 754th Electronic Systems Group (Gunter Annex, Maxwell AFB), but this could not be traced to a citable primary source and is NOT adopted as fact [Unknown/Unconfirmed]. A separate, uncited claim placing the operator at Hanscom AFB, Massachusetts conflicts with the RDAP-listed Maxwell AFB, AL address and is not used.

ASN / name

AS548 / HQUSAF-AS [Confirmed] — https://rdap.arin.net/registry/autnum/548

Analyst note

Dormant legacy military ASN with a clean registration record; live routing infrastructure, if any, is not carried under AS548 itself.