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.

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.