AS492

AS492 is a legacy autonomous system number administered by ARIN as part of the AFCONC-BLOCK1-AS block (RDAP handle AS379, spanning AS379–AS508), registered to Air Force Systems Networking — a U.S. Air Force / Department of Defense operator (ARIN org handle 7ESG). The block's registrant address traces to 501 East Moore Dr., Maxwell AFB, Alabama, while day-to-day abuse, administrative, and technical contact runs through the DISA-Columbus registration team in Whitehall, Ohio. Like its block-mate AS490 (already enriched), AS492 shows no current routing activity: RIPEstat reports zero announced IPv4 or IPv6 prefixes as of July 2026, with 0 of 327 IPv4 and 0 of 321 IPv6 RIS peers observing any route, and CAIDA AS Rank (79,459) confirms a singleton customer cone with no peers, customers, or upstreams. Historically the ASN originated three legacy DoD Network Information Center blocks — 159.77.4.0/22, 159.77.8.0/22, and 215.65.76.0/22 — last seen announced on 2021-11-18. Hurricane Electric's looking glass flags these legacy prefixes with an "announces bogons" banner, which reads as a routing-hygiene artifact tied to long-dark DoD address space rather than documented malicious activity; Spamhaus's ASN-DROP feed carries no listing for AS492, and no NANOG-archive hits were found. No public peering policy or ASN-specific operator page exists; AS492 is absent from the ASN list on the PeeringDB org record for Air Force Systems Networking.

Operator

Air Force Systems Networking (U.S. Air Force / DoD; ARIN org handle 7ESG); registrant address 501 East Moore Dr., Bldg 884 Rm 1100, Gunther Annex, Maxwell AFB, AL 36114 [Confirmed] — https://rdap.arin.net/registry/autnum/492

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/492

Allocated

1989-08-04 — ARIN RDAP top-level registration event on the containing AS379–AS508 block record (AFCONC-BLOCK1-AS); ARIN did not return a discrete per-ASN event for AS492, so this is a block-scoped first-party registry date, not decoy data. Last changed 2008-06-06

[Confirmed] — https://rdap.arin.net/registry/autnum/492

Org status

active (ARIN registry status); registrant "Air Force Systems Networking" at Maxwell AFB, AL; abuse/admin/tech contact DISA-Columbus, 300 North James Road, Whitehall, OH 43213, disa.columbus.ns.mbx.arin-registrations@mail.mil [Confirmed] — https://rdap.arin.net/registry/autnum/492

Website / official page

Unknown — no ASN-specific operator, about, or peering-policy page found; general DoD network infrastructure is documented at disa.mil but not tied specifically to AS492 [Unknown] — https://www.disa.mil/

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal as of 2026-07-10 — clean against a live Spamhaus ASN-DROP query, no AS492-specific NANOG-archive hits; bgp.he.net displays an "announces bogons" banner for the three legacy DoD prefixes, assessed as a routing-hygiene/bogon-list-lag artifact from long-dark DoD space rather than evidence of malicious use; a third-party community ASN blacklist could not be verified (404) and is left Unknown rather than claimed clean

Network & routing

Network type

U.S. government/military network (Air Force / DoD), non-commercial; currently dormant in BGP [Confirmed] — https://bgp.he.net/AS492, https://rdap.arin.net/registry/autnum/492

Size

0 IPv4 prefixes / 0 addresses and 0 IPv6 prefixes currently announced; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — https://stat.ripe.net/AS492, https://api.asrank.caida.org/v2/restful/asns/492

Routing/peering

NOT currently announced — 0 of 327 v4 / 0 of 321 v6 RIS peers seeing it; CAIDA degree total 0 (customer 0, peer 0, provider 0); no upstreams or peers visible [Confirmed]. No published peering policy; AS492 not listed among ASNs under PeeringDB org 20118 (Air Force Systems Networking)

[Confirmed] — https://stat.ripe.net/AS492, https://api.asrank.caida.org/v2/restful/asns/492, https://www.peeringdb.com/org/20118

RPKI

not assessable — no currently announced prefixes, so there is nothing to validate against (RPKI check requires a --prefix argument) [Confirmed] — https://stat.ripe.net/AS492

Notable usage

historically originated three legacy DoD Network Information Center blocks (159.77.4.0/22, 159.77.8.0/22, 215.65.76.0/22); first seen 2016-06-30, last seen 2021-11-18; one observed historical BGP peer, AS367 (U.S. DoD) [Confirmed] — https://bgp.he.net/AS492, https://stat.ripe.net/AS492

Related ASNs

AS490 (same AS379–AS508 block/org, already enriched) [Confirmed] — https://rdap.arin.net/registry/autnum/492

Analyst note

Dormant legacy military ASN within a large sequential DoD/Air Force block. RDAP returns a block-level record (AS379–AS508), not a discrete AS492 delegation; all routing sources agree on zero current announcements since late 2021.