AS425

AS425 is a legacy autonomous system number registered under ARIN as part of the block record AFCONC-BLOCK1-AS, which spans AS379 through AS508 under the block handle AS379. There is no AS425-specific ARIN autnum object: the RDAP query for autnum/425 resolves to this shared block registration, and the block's top-level registration event (1989-08-04) is the allocation record ARIN exposes for any ASN in that range, including 425. The registrant organization is Air Force Systems Networking (org handle 7ESG), listed at Maxwell AFB, Alabama — a unit of the U.S. Department of the Air Force, not a commercial ISP, hosting provider, or content network. Administrative, technical, and abuse contact routes through DISA-Columbus (Defense Information Systems Agency), Whitehall, Ohio, at disa.columbus.ns.mbx.arin-registrations@mail.mil. The key triage point for AS425 is that it is effectively dormant today. RIPEstat, CAIDA AS Rank, and the RDAP/RIPEstat routing status all agree it announces zero IPv4 and zero IPv6 prefixes, is seen by 0 of 324 RIS peers for v4 and 0 of 320 for v6, and has an empty customer cone (1 ASN — itself — 0 prefixes, 0 addresses). Historical routing shows it announced 131.38.0.0/16 through 131.49.0.0/16-era space between 2000-08-18 and 2003-01-09, with no announcements since. Its CAIDA AS rank of 79,459 (source ARIN) sits near the bottom of the global ranking, reflecting complete routing inactivity. RPKI posture cannot be assessed because there are no active originations and therefore no ROAs. No notable public abuse signal was found as of 2026-07-02 — not in Spamhaus, Cisco Talos, AbuseIPDB, or NANOG archives — consistent with a clean, dormant government/military allocation.

Operator

Air Force Systems Networking (registrant org handle 7ESG; part of U.S. Department of the Air Force / DoD; not a distinct commercial legal entity) [Confirmed] — ARIN RDAP autnum/425 registrant vcard

Country / RIR

US, ARIN [Confirmed] — RIPEstat abuse-contact-finder (authoritative_rir: arin); ARIN RDAP

Allocated

1989-08-04 (ARIN registry date for the AS379–AS508 block containing AS425, read from RDAP autnum TOP-LEVEL events[] eventAction registration — a first-party RIR fact, NOT an IEEE date); last changed 2008-06-06 [Confirmed] — ARIN RDAP autnum top-level events

Org status

active per ARIN RDAP status field (status: active for the AS379–AS508 block); this is a registry-status flag, not a claim of current network activity — operationally AS425 is dormant/non-announcing [Confirmed] — ARIN RDAP

Contacts

disa.columbus.ns.mbx.arin-registrations@mail.mil (handle REGIS10-ARIN, roles abuse/administrative/technical; DISA-Columbus, 300 North James Road, Whitehall, OH 43213); registrant address 501 East Moore Dr. Bldg 884 Rm 1100 Gunther Annex, Maxwell AFB, AL 36114

[Confirmed] — ARIN RDAP; RIPEstat abuse-contact-finder

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-02 — not in Spamhaus (SBL/DBL/DROP), Cisco Talos, AbuseIPDB, or NANOG archives; consistent with a DoD-administered block, not a commercial network typically flagged on abuse feeds; AbuseIPDB direct AS425 page returned HTTP 403 and was not substituted with fabricated data

Network & routing

Network type

U.S. Department of Defense / U.S. Air Force internal/government network allocation (legacy ARIN block); AS425 is legacy/inactive [Likely] — ARIN RDAP; ipinfo.io/AS425 (third-party generic classification is a database artifact, no first-party self-description exists)

Size

dormant — 0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — RIPEstat routing-status / CAIDA AS Rank (2026-07)

Routing/peering

NOT announced — announced: false per RIPEstat as-overview; 0 RIS peers seeing it (0/324 v4, 0/320 v6); CAIDA asnDegree total 0 (customer 0, peer 0, provider 0); RIPEstat observed_neighbours 0; no upstreams or peers visible [Confirmed] — RIPEstat routing-status / CAIDA AS Rank

RPKI

not assessable — AS425 announces no prefixes, so there are no ROAs to validate; RIPEstat rpki-validation requires a --prefix and was skipped [Unknown] — RIPEstat rpki-validation (no announced prefix)

Notable usage

AS425 is one member of the contiguous legacy ARIN block AFCONC-BLOCK1-AS (AS379–AS508, handle AS379) registered as a single top-level unit to Air Force Systems Networking; it last announced routes in the 131.38.0.0/16–131.49.0.0/16 range between 2000-08-18 and 2003-01-09 and appears unrouted/inactive since; no AS425-specific usage narrative or public statement was found on any official .af.mil or .mil page

[Confirmed] — ARIN RDAP; RIPEstat routing-status

Related ASNs

AS379–AS508 share the AFCONC-BLOCK1-AS block record (handle AS379); a PeeringDB org for "Air Force Systems Networking" (id 20118) exists but lists a different ASN set (AS65, AS123, AS175, AS221, AS301) and does NOT include AS425, so it is not AS425's own PeeringDB record

[Confirmed] — ARIN RDAP; peeringdb.com/org/20118

Analyst note

Encountered as a dormant legacy government/military ASN. RDAP for autnum/425 resolves to the shared AS379–AS508 block registration (no AS425-specific autnum object); the block's top-level 1989-08-04 registration event is recorded as the allocated_date per the RIR-date rule, with the block-vs-individual-AS distinction called out. Nested entity events (REGIS10-ARIN 2009-06-24, org 7ESG 2008-06-05) are decoys and were excluded. Clean, inactive ASN.