AS485

AS485 (AFCONC-BLOCK1-AS) is a legacy ARIN-registered autonomous system number held by Air Force Systems Networking, the U.S. Air Force's DoD-facing program for Active Duty, Reserve, and Guard network infrastructure, administered on ARIN's registry by DISA Columbus under org handle 7ESG. The ASN is one entry inside a large legacy block spanning AS379 through AS508, all allocated to the same Air Force organization on 1989-08-04 per the ARIN RDAP top-level autnum registration event — a first-party registry fact distinct from the block's most recent metadata refresh (last changed 2008-06-06). Unlike several dormant siblings sharing the same block (e.g. AS479, AS484), AS485 is actively routed today: it announces five IPv4 prefixes totalling 2,304 addresses out of 144.88.0.0/16, visible to 326 of 327 RIPE RIS peers, with a single observed upstream relationship to AS27064 (DoD Network Information Center) and no IPv6 announcements. CAIDA AS Rank places it at 26,017 globally with a customer cone limited to itself (5 prefixes, 2,304 addresses). bgp.he.net flags a stale "announces bogons" annotation on its prefixes, but this appears to be a lagging bogon-filter artifact rather than an abuse signal, since ARIN shows the containing /16 as a legitimately registered, active DoD allocation and Spamhaus ASN-DROP carries no listing for the ASN. As expected for military infrastructure, no public NANOG, Reddit, or published peering-policy documentation was found.

Operator

Air Force Systems Networking (U.S. Air Force / DoD); ARIN registrant "Air Force Systems Networking", administered on ARIN by org "Registration" (DISA-Columbus, handle 7ESG) [Confirmed] — https://rdap.arin.net/registry/autnum/485, https://rdap.arin.net/registry/entity/7ESG

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/485

Allocated

1989-08-04 (ARIN RDAP top-level autnum registration event for the AS379–AS508 block); last changed 2008-06-06 [Confirmed] — https://rdap.arin.net/registry/autnum/485

Org status

active (ARIN RDAP status for the containing autnum block and registrant org) [Confirmed] — https://rdap.arin.net/registry/entity/7ESG

Contacts

abuse/administrative/technical disa.columbus.ns.mbx.arin-registrations@mail.mil; registrant address 501 East Moore Dr, Bldg 884 Rm 1100 Gunther Annex, Maxwell AFB, AL 36114, United States [Confirmed] — https://rdap.arin.net/registry/entity/REGIS10-ARIN

Security/abuse context (NEUTRAL, DATED)

not listed in live Spamhaus ASN-DROP as of 2026-07-10; bgp.he.net shows a "announces bogons" flag on its prefixes, very likely a lagging bogon-filter artifact rather than an abuse signal, since ARIN shows the containing /16 as a legitimately registered, active DoD allocation

Network & routing

Network type

government/military (U.S. Department of the Air Force, DoD); not a commercial ISP; ARIN status active [Confirmed] — https://rdap.arin.net/registry/autnum/485

Size

actively announced — 5 IPv4 prefixes / 2,304 addresses across 144.88.0.0/16 sub-blocks; 0 IPv6 prefixes [Confirmed] — https://stat.ripe.net/data/announced-prefixes/data.json?resource=485, https://stat.ripe.net/data/routing-status/data.json?resource=485

Routing/peering

visible to 326/327 RIS v4 peers, 0/321 v6; CAIDA degree total 1 (provider 1, customer 0, peer 0); sole observed upstream AS27064 (DoD Network Information Center) [Confirmed for visibility/degree; Likely for AS27064 identity] — https://stat.ripe.net/data/routing-status/data.json?resource=485, https://asrank.caida.org/asns/485, https://bgp.he.net/AS485

Peering policy

not publicly published; no PeeringDB network object exists for AS485 itself (a PeeringDB org "Air Force Systems Networking" exists but does not list AS485 among member networks) [Unknown] — https://www.peeringdb.com/org/20118

RPKI

not confirmed from primary RIPEstat data (rpki-validation call was skipped, no prefix supplied); bgp.he.net shows no RPKI-valid or -invalid origins observed for AS485's prefixes [Likely] — https://bgp.he.net/AS485

Notable usage

part of the Air Force Enterprise Network (AFNET) numbering pool; the broader AFSN program covers design, implementation, and sustainment of Air Force classified and unclassified wired/wireless networks (JRSS, JIE Air Force portions) — no source ties AS485's specific prefixes to a named base or mission

[Likely] — https://solutions71.com/air-force-systems-networking-afsn/

Related ASNs

shares the legacy AFCONC-BLOCK1-AS block (AS379–AS508) with dormant, already-enriched siblings AS479 and AS484; AS485 differs in being actively routed [Confirmed for block membership; Likely for sibling comparison] — https://rdap.arin.net/registry/autnum/485

Registry block context

AS485 sits inside ARIN legacy block handle AS379, name AFCONC-BLOCK1-AS, spanning AS379–AS508 [Confirmed] — https://rdap.arin.net/registry/autnum/485

Analyst note

Military ASN with minimal public visibility; no NANOG/Reddit community discussion or documented outages found, which is typical for DoD infrastructure and not a reliability signal. Actively routed today, unlike several dormant siblings in the same legacy block.