AS737

AS737 is a dormant, unannounced autonomous system registered to the U.S. Air Force under ARIN as part of the AFCONC-BLOCK2-AS block, and it currently carries zero routed IPv4 or IPv6 prefixes on the public Internet.

The ASN is not a standalone RDAP object. ARIN registers it as one member of a contiguous range, AS727–AS746, held by "Air Force Systems Networking." The registrant organization address is Maxwell AFB, AL; the admin, technical, and abuse contact is DISA-Columbus (300 North James Road, Whitehall, OH), reachable at disa.columbus.ns.mbx.arin-registrations@mail.mil.

Every routing source checked agrees on complete inactivity: RIPEstat shows 0 announced IPv4 and 0 IPv6 prefixes with 0 of 329 v4 RIS peers and 0 of 324 v6 RIS peers observing the ASN, and CAIDA AS Rank places it at rank 79,459 with seen=false, a singleton customer cone (1 ASN, 0 prefixes, 0 addresses), and zero upstreams, peers, or customers. Hurricane Electric's BGP toolkit corroborates zero currently-announced prefixes as of 2026-07-27.

The RDAP autnum's top-level events array does not carry a distinct "registration" event for this block — only a last-changed event dated 2008-06-06. A live re-fetch confirmed this is not a truncation artifact. Two research angles surfaced a 2008-06-05 timestamp and labeled it a top-level registration date, but that timestamp actually belongs to the registrant entity object, not the autnum's top-level events array, so it is treated as a decoy per the extraction rule and not recorded as allocated_date.

No PeeringDB network object exists for AS737, and the PeeringDB org for Air Force Systems Networking (org id 20118) lists only ASNs 65, 123, 175, 221, and 301 — AS737 is absent. No official public-facing website or documented peering policy was located, consistent with a non-commercial DoD network block.

Exposure

Not applicable — AS737 announces no prefixes and has no visible BGP peers, upstreams, or customers, so there is no live attack surface to assess.

Abuse signal

No notable public abuse signal found for AS737 as of 2026-07-27 across Spamhaus DROP/ASN-DROP pages and NANOG mailing-list archive searches; unrelated incidents involving other DoD-block ASNs (e.g., AS749, AS34109) surfaced but do not implicate AS737.

RPKI

Not assessable — with zero announced prefixes there are no routes to validate and no ROAs to check.

Visibility caveat

The abuse-free finding is an absence-of-evidence result from open web search and two named sources, not an exhaustive audit against commercial threat-intel feeds.

Operator

Air Force Systems Networking (U.S. Air Force / DoD); ARIN registrant at Maxwell AFB, AL; admin/tech/abuse contact DISA-Columbus, OH [Confirmed] — https://rdap.arin.net/registry/autnum/737

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/737

Allocated

Unknown — the autnum's top-level RDAP events[] carries no "registration" eventAction, only a last-changed event dated 2008-06-06; a 2008-06-05 timestamp found elsewhere belongs to the registrant entity object, not the top-level autnum record, and is treated as a decoy

[Confirmed as an absence] — https://rdap.arin.net/registry/autnum/737

Org status

Active per ARIN RDAP [Confirmed] — https://rdap.arin.net/registry/autnum/737

Contacts

disa.columbus.ns.mbx.arin-registrations@mail.mil (DISA-Columbus, 300 North James Road, Whitehall, OH 43213) [Confirmed] — https://rdap.arin.net/registry/autnum/737

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-27 — not in Spamhaus DROP/ASN-DROP or NANOG archive searches specific to AS737

Network & routing

Network type

Government/military (US Air Force / DoD), non-commercial [Likely] — https://rdap.arin.net/registry/autnum/737

Size

dormant — 0 IPv4 and 0 IPv6 announced prefixes; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — https://stat.ripe.net/AS737, https://api.asrank.caida.org/v2/restful/asns/737

Routing/peering

NOT announced — 0 of 329 RIS peers see it (v4), 0 of 324 (v6); CAIDA seen=false, 0 upstreams/peers/customers; no PeeringDB network object exists for AS737 (org id 20118 lists ASNs 65, 123, 175, 221, 301, not 737)

[Confirmed] — https://stat.ripe.net/AS737, https://api.asrank.caida.org/v2/restful/asns/737, https://www.peeringdb.com/org/20118

RPKI

not assessable — no announced prefixes, so no ROAs to validate [Confirmed] — https://stat.ripe.net/AS737

Notable usage

Unknown / not publicly documented [Unknown]

Related ASNs

part of the AS727–AS746 block registration (AFCONC-BLOCK2-AS) [Confirmed] — https://rdap.arin.net/registry/autnum/737

Analyst note

dormant DoD/Air Force ASN inside a block registration (AS727–AS746); no independent RDAP object, no PeeringDB listing, no public website, and no documented registration date at the autnum top level.