AS744

AS744 is a dormant, unannounced autonomous system registered to the U.S. Air Force (ARIN org handle 7ESG, "Air Force Systems Networking") that currently carries zero IPv4 and zero IPv6 routes in the global routing table, with no BGP peers or upstreams visible in any source consulted.

The ASN is part of ARIN's multi-ASN block registration AS727-AS746 ("AFCONC-BLOCK2-AS"), registrant Air Force Systems Networking at Maxwell AFB (Gunther Annex), Montgomery, AL. Admin, technical, and abuse contact routes through DISA-Columbus (handle REGIS10-ARIN), a DoD registration desk, rather than a dedicated network-operations team. No corporate "about" page, IR page, or peering-policy page was found; AS744 has no PeeringDB network record (peeringdb.com/asn/744 returns 404).

Historically the ASN originated a single prefix, 139.241.238.0/24, first seen around 2020-05-30. Sources diverge slightly on when it went dark: RIPEstat's routing-status shows a last-seen date of 2025-07-08, while bgp.he.net reports the ASN "has not been visible in the global routing table since August 04, 2025" — both agree it is currently unannounced. CAIDA AS Rank places it at 79,459 with a singleton customer cone (itself, 0 prefixes) and zero observed provider/peer degree, consistent with a fully inactive ASN.

The ARIN RDAP record's only top-level event is "last changed" dated 2008-06-06; there is no top-level "registration" event on this block record. A last-changed timestamp is not an allocation date, so allocated_date is recorded here as Unknown rather than backfilled from it — the same standard already applied below to ipinfo.io's 1970-01-01 placeholder. No official operator website was located.

Operator

Air Force Systems Networking (ARIN org handle 7ESG; U.S. Department of the Air Force), Maxwell AFB (Gunther Annex), Montgomery, AL [Confirmed] — rdap.arin.net/registry/entity/7ESG

Country / RIR

US, ARIN [Confirmed] — rdap.arin.net/registry/autnum/744

Allocated

Unknown — the autnum's only top-level RDAP event is "last changed" (2008-06-06); no top-level registration event exists on this multi-ASN block record, and a last-changed timestamp is not treated as an allocation date [Confirmed absence] — rdap.arin.net/registry/autnum/744

Org status

ARIN registration record active (block AS727-AS746 / org 7ESG); current BGP visibility inactive since mid-to-late 2025 [Confirmed] — rdap.arin.net/registry/autnum/744

Contacts

DISA-Columbus registration desk, disa.columbus.ns.mbx.arin-registrations@mail.mil, +1-844-347-2457 ext. 2; 300 North James Rd, Whitehall, OH 43213 [Confirmed] — rdap.arin.net/registry/entity/REGIS10-ARIN

Security/abuse context (NEUTRAL, DATED)

no confirmed public abuse signal as of 2026-07-27; a bogon-list flag on the historical prefix appears to be a stale-allocation artifact, not evidence of abuse; Spamhaus check blocked (403) and NANOG archive search incomplete (quota exhaustion) — treat as a bounded, dated null rather than exhaustive clearance

Network & routing

Network type

U.S. federal government / military internal network (Department of the Air Force); not a commercial ISP or enterprise operator; currently inactive/unannounced [Confirmed] — rdap.arin.net/registry/entity/7ESG

Size

dormant — 0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes currently announced; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — RIPEstat routing-status, CAIDA AS Rank (2026-07)

Routing/peering

NOT announced — 0/329 RIS peers seeing v4, 0/324 seeing v6; CAIDA provider/peer degree both 0; no PeeringDB network record (asn/744 = 404) [Confirmed]. Historical prefix 139.241.238.0/24 last seen 2025-07-08 (RIPEstat) to 2025-08-04 (bgp.he.net) [Likely — sources diverge on exact date]

RPKI

not assessable — zero currently announced prefixes, so there are no live routes to validate against a ROA [Confirmed]

Notable usage

Historically originated a single /24 (139.241.238.0/24) with one observed peer, AS27064 (DoD Network Information Center); no public corporate site or peering policy found for this DoD-internal ASN [Likely] — bgp.he.net/AS744, ipinfo.io/AS744

Related ASNs

part of ARIN block AS727-AS746 ("AFCONC-BLOCK2-AS", org 7ESG); no other individually named sibling ASNs confirmed [Confirmed for block membership] — rdap.arin.net/registry/autnum/744

Analyst note

Encountered as a dormant DoD/Air Force internal ASN inside a multi-ASN ARIN block registration rather than a standalone corporate record; no public operator website, peering policy, or PeeringDB presence exists. Routing sources agree it is fully unannounced today.