AS740

AS740 is a dormant, unannounced autonomous system number that sits inside a U.S. Air Force / DoD numbering block — ARIN's AFCONC-BLOCK2-AS, covering AS727–AS746 — and it currently carries zero live routing: no announced IPv4 or IPv6 prefixes, no BGP peers, and no upstreams.

The block is registered under ARIN org handle 7ESG ("Air Force Systems Networking"), physically addressed to Maxwell AFB, AL, with admin/technical/abuse contact routed through DISA-Columbus in Whitehall, OH. ARIN's RDAP autnum object exposes only a single top-level "last changed" event dated 2008-06-06; there is no distinct top-level "registration" eventAction, so the original allocation date cannot be extracted from the authoritative record and is recorded here as Unknown rather than backfilled from decoy entity-level dates (2008-06-05 org registration, 2009-06-24 POC registration).

Routing history is thin: RIPEstat's only recorded origination is 198.220.214.0/24, seen 2005-03-06 through 2005-07-10, with nothing announced since. CAIDA AS Rank places it at 79,459 with a singleton customer cone (0 prefixes, 0 addresses), and no PeeringDB record exists for AS740 or for the parent AS727 block — consistent across bgp.he.net, bgp.tools, and RIPEstat.

Secondary trackers describe "Air Force Systems Networking (AFSN)" as delivering design, installation, and sustainment of Air Force classified and unclassified data communications, possibly tied to the 754th Electronic Systems Group at Maxwell AFB/Gunter Annex. This could not be corroborated on an official .mil page — candidate wpafb.af.mil and acc.af.mil pages returned HTTP 403 — so it is tagged Likely rather than Confirmed.

Operator

Air Force Systems Networking, ARIN org handle 7ESG; U.S. Air Force / DoD, administered via DISA-Columbus [Confirmed] — https://rdap.arin.net/registry/autnum/740

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/740

Allocated date

Unknown — the autnum object's top-level events[] carries only a "last changed" action (2008-06-06); no top-level "registration" eventAction exists to extract an allocation date from [Confirmed absence of the field] — https://rdap.arin.net/registry/autnum/740

Org status

active (ARIN RDAP org status for 7ESG) [Confirmed] — https://rdap.arin.net/registry/autnum/740

Website

Unknown — no dedicated public operator website found for this DoD numbering block [Unknown]

Abuse/admin/tech POC

disa.columbus.ns.mbx.arin-registrations@mail.mil (handle REGIS10-ARIN, org "Registration," DISA-Columbus, 300 N James Rd, Whitehall, OH 43213)

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-27 — absent from the live Spamhaus ASN-DROP feed; no AS740-specific NANOG archive hits [Confirmed for Spamhaus absence; Likely for NANOG null result] — https://www.spamhaus.org/drop/asndrop.json

Network & routing

Network type

U.S. DoD / Air Force internal enterprise-network numbering block, not a commercial ISP or content network [Likely] — https://rdap.arin.net/registry/autnum/740

Size

dormant — 0 IPv4 and 0 IPv6 prefixes announced; customer cone is a singleton (1 ASN, 0 prefixes, 0 addresses); CAIDA AS rank 79,459 [Confirmed] — https://stat.ripe.net/AS740, https://api.asrank.caida.org/v2/restful/asns/740, https://bgp.he.net/AS740, https://bgp.tools/as/740

Historical routing

one historical origination, 198.220.214.0/24, first seen 2005-03-06, last seen 2005-07-10, none since [Confirmed] — https://stat.ripe.net/AS740

Routing/peering

no upstreams, peers, or IX presence observed; no PeeringDB record for AS740 or for parent AS727 block [Confirmed] — https://www.peeringdb.com/api/net?asn=740, https://www.peeringdb.com/api/net?asn=727

RPKI

not assessable — no currently announced prefixes exist to validate against a ROA [Confirmed] — https://stat.ripe.net/AS740

Notable usage

secondary sources tie "Air Force Systems Networking (AFSN)" to design/installation/sustainment of AF data communications, possibly under the 754th Electronic Systems Group at Maxwell AFB/Gunter Annex; not corroborated on an official .mil page (403 responses) [Likely] — https://ipgeolocation.io/browse/asn/AS727, https://govtribe.com/opportunity/federal-contract-opportunity/air-force-systems-networking-afsn, https://solutions71.com/air-force-systems-networking-afsn/

Related ASNs

AS727–AS746, the AFCONC-BLOCK2-AS block registration [Confirmed] — https://rdap.arin.net/registry/autnum/740

ASN / block

AS740, part of ARIN's AFCONC-BLOCK2-AS block registration (AS727–AS746); no separate ARIN sub-object exists for AS740 itself [Confirmed] — https://rdap.arin.net/registry/autnum/740

Org address

501 East Moore Dr, Bldg 884 Rm 1100, Gunther Annex, Maxwell AFB, AL 36114 [Confirmed] — https://rdap.arin.net/registry/autnum/740

Analyst note

Dormant DoD/Air Force ASN inside a multi-ASN block registration; RDAP autnum object exposes no top-level registration date (only a 2008-06-06 "last changed" event), so allocated_date is recorded Unknown rather than inferred from entity-level decoy dates. Zero live routing agrees across RIPEstat, CAIDA, bgp.he.net, and bgp.tools; one 2005 historical origination and no notable abuse signal.