AS383

AS383 is a legacy autonomous system number registered under ARIN to Air Force Systems Networking — a U.S. Department of Defense / United States Air Force network resource administered by the Defense Information Systems Agency (DISA). It sits inside a contiguous early ASN block (RDAP resolves AS383 to the containing registration handle AS379, spanning startAutnum 379 through endAutnum 508, ASName AFCONC-BLOCK1-AS); this block-resolution is standard ARIN behavior for legacy block-registered ASNs, not a data error. The registrant org (ARIN handle 7ESG) lists an address at 501 East Moore Dr., Bldg 884 Rm 1100, Gunter Annex, Maxwell AFB, AL 36114, while the abuse, administrative, and technical contact routes through DISA-Columbus (300 North James Road, Whitehall, OH 43213; disa.columbus.ns.mbx.arin-registrations@mail.mil). The key triage point for AS383 is that it is effectively dormant today: RIPEstat reports it announces zero IPv4 and zero IPv6 prefixes, is seen by zero RIS peers (0/323 v4, 0/322 v6), has zero upstreams, zero peers, and zero observed neighbours. RDAP status remains "active," but Hurricane Electric's BGP Toolkit shows nothing visible in the global routing table since 2024-03-02; its sole historically originated prefix, 132.3.32.0/22, is flagged as a bogon route (first seen announcing 131.62.0.0/16 on 2007-11-08, last seen 132.3.32.0/22 on 2024-01-29). No PeeringDB net record exists (API 404). RPKI posture is not assessable — there are no active originations and therefore no ROAs. No notable public abuse signal was found as of 2026-07-02 — not in Spamhaus resources nor in general web / NANOG-archive searches — consistent with a clean, dormant military ASN whose restricted public visibility reflects operational-security policy rather than reputation.

Operator

Air Force Systems Networking (U.S. DoD / U.S. Air Force; ARIN OrgId 7ESG; administered by DISA-Columbus) [Confirmed] — ARIN RDAP (https://rdap.arin.net/registry/autnum/383)

Country / RIR

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

Allocated

1989-08-04 (ARIN registry date from the autnum TOP-LEVEL registration event for the containing AS379–AS508 block — a first-party RIR fact, NOT an IEEE date; the nested entity/org events of 2008-06-05 and 2009-06-24 are decoys); last changed 2008-06-06

[Confirmed] — ARIN RDAP autnum top-level events (https://rdap.arin.net/registry/autnum/383)

Org status

active per ARIN RDAP; U.S. Air Force network resource administered by DISA (registrant Gunter Annex, Maxwell AFB, AL; admin/tech/abuse via DISA-Columbus, OH) [Confirmed] — ARIN RDAP (https://rdap.arin.net/registry/autnum/383)

Contacts

abuse/admin/tech via DISA-Columbus — disa.columbus.ns.mbx.arin-registrations@mail.mil, +1-844-347-2457 ext.2; registrant HQ 501 East Moore Dr., Bldg 884 Rm 1100, Gunter Annex, Maxwell AFB, AL 36114 [Confirmed] — ARIN RDAP (https://rdap.arin.net/registry/autnum/383)

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-02 — not in Spamhaus resources (SBL/DROP), nor in general web / NANOG-archive searches for "AS383"; dormant/unrouted network with a bogon-flagged historical prefix limits abuse surface; direct Spamhaus/Team Cymru API lookups were not queried, so read this as "no signal surfaced via web search," not an exhaustive clearance

Network & routing

Network type

U.S. government / military network (DoD, U.S. Air Force / AFNET lineage); not a commercial ISP, hosting, or content network; AS383 is legacy/inactive [Confirmed] — ARIN RDAP; bgp.he.net/AS383

Size

dormant — 0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes; 0 observed neighbours [Confirmed] — RIPEstat routing-status (https://stat.ripe.net/AS383)

Routing/peering

NOT announced — 0 RIS peers seeing it (0/323 v4, 0/322 v6); RIPEstat observed_neighbours 0; no public peering policy published; no PeeringDB net record (API 404 for asn=383) [Confirmed] — RIPEstat (https://stat.ripe.net/AS383), peeringdb.com/api/net?asn=383

RPKI

not assessable — AS383 announces no prefixes, so there are no ROAs to validate (RIPEstat rpki-validation requires a prefix; none applicable); bgp.he.net shows no RPKI records [Unknown] — RIPEstat rpki-validation (skipped, no prefix), bgp.he.net/AS383

Notable usage

part of a contiguous historical ASN block (AS379 through ~AS508) allocated to Air Force Systems Networking for DoD/Air Force internal networking since the earliest ASN allocations; sole historical prefix 132.3.32.0/22 is bogon-flagged; one historical IPv4 peering relationship observed with AS27064 (DoD Network Information Center); no specific public-facing services documented

[Likely] — bgp.he.net/AS383

Historical routing

first seen announcing 131.62.0.0/16 on 2007-11-08; last seen announcing 132.3.32.0/22 on 2024-01-29; not visible in the global table since 2024-03-02 [Confirmed] — RIPEstat routing-status (https://stat.ripe.net/AS383), bgp.he.net/AS383

Related ASNs

AS379 (same AFCONC-BLOCK1-AS block, already enriched, same 7ESG registrant and DISA-Columbus contact); AS27064 (DoD Network Information Center, historical peer) [Confirmed for AS379 block membership; Likely for AS27064 historical peer per bgp.he.net]

Analyst note

Encountered as a dormant legacy military ASN registered to Air Force Systems Networking via DISA; RDAP status is "active" but no prefixes have been visible in BGP since 2024-03-02, and the only historical prefix is bogon-flagged. Mirrors sibling AS379 in the same block (same org, same administrative contact, same lack of public operator presence). The absence of community/peering presence reflects deliberate DoD operational security, not a defunct or ill-reputed operator. Clean, inactive ASN.