AS432

AS432 is a legacy autonomous system number registered under ARIN as part of a flat bulk block record named AFCONC-BLOCK1-AS, which spans AS379 through AS508 and is held by Air Force Systems Networking — the registrant organization on file being "7ESG" (the 754th Electronic Systems Group), a U.S. Air Force unit, with DISA-Columbus (Defense Information Systems Agency) as the administrative, technical, and abuse point of contact. Because ARIN represents this range as a single flat block, the RDAP record for autnum 432 resolves to the block handle AS379 and does not expose a per-ASN sub-registration; the authoritative first-party registry date is therefore the block's top-level registration event of 1989-08-04. The key triage point for AS432 is that it is operationally dormant: every routing source consulted (RIPEstat, CAIDA AS Rank) agrees it announces zero IPv4 and zero IPv6 prefixes, is not visible on any RIS route collector (0 of 324 v4 peers, 0 of 320 v6 peers), and has an AS degree of zero across customer, peer, and provider. Its CAIDA AS rank of 79,459 sits near the bottom of the global ranking, and its customer cone is a singleton (the ASN itself, 0 prefixes, 0 addresses). There is no PeeringDB record (peeringdb.com/asn/432 returns 404) and no published peering policy — consistent with a non-commercial DoD allocation. RPKI posture is not assessable 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 DROP/ASN-DROP resources, NANOG archives, or general threat-intel searches — consistent with a clean, unrouted legacy government block.

Operator

Air Force Systems Networking (U.S. Air Force; registrant org "7ESG" / 754th Electronic Systems Group, Maxwell AFB-Gunter Annex, AL; admin/tech/abuse POC DISA-Columbus) [Confirmed] — ARIN RDAP autnum/432, bgp.he.net/AS432

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP autnum/432; RIPEstat abuse-contact-finder (authoritative_rir: arin)

Allocated

1989-08-04 (ARIN registry date from the autnum top-level registration event; this is the AFCONC-BLOCK1-AS block record AS379–AS508 that contains AS432 — ARIN does not expose a per-ASN sub-event within a flat bulk block; NOT an IEEE date); last changed 2008-06-06

[Confirmed] — ARIN RDAP autnum top-level events

Org status

active per ARIN RDAP record status; the 754th Electronic Systems Group / DISA registrant is an active DoD entity; however AS432 itself is operationally dormant (0 announced prefixes, 0 BGP peers) so it is not currently visible on the public Internet

[Confirmed] — ARIN RDAP autnum/432, bgp.he.net/AS432

Contacts

disa.columbus.ns.mbx.arin-registrations@mail.mil (+1-844-347-2457 ext.2; DISA-Columbus, 300 North James Road, Whitehall, OH 43213); registrant address 501 East Moore Dr., Bldg 884 Rm 1100 Gunter Annex, Maxwell AFB, AL 36114 [Confirmed] — ARIN RDAP autnum/432, RIPEstat abuse-contact-finder

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-02 — not in Spamhaus DROP/ASN-DROP resources, NANOG archives, or general web/threat-intel searches; an unrouted ASN would not originate traffic, a plausible explanation for the absence of signal

Network & routing

Network type

U.S. military / government network (Department of the Air Force, DoD); not a commercial ISP, hosting, or enterprise network; AS432 is legacy/inactive within the block [Confirmed] — ARIN RDAP autnum/432, bgp.he.net/AS432

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 — RIPEstat as-overview announced=false; announced-prefixes query (2000-08-01 to 2026-07-02) returned zero; 0 RIS peers seeing it (0/324 v4, 0/320 v6); CAIDA degree total 0 (customer 0, peer 0, provider 0); no upstreams or peers observed [Confirmed]. No PeeringDB record and no published peering policy (peeringdb.com/asn/432 → 404) [Confirmed]

RPKI

not assessable — AS432 announces no prefixes, so there are no ROAs to validate; RIPEstat rpki-validation requires a prefix parameter and none exists [Confirmed]

Notable usage

no individual public-facing service, website, or peering activity tied specifically to AS432; it appears to be an internal/reserved allocation within the AFCONC-BLOCK1-AS block supporting Air Force / DoD combat-support IT and network systems

[Likely] — ARIN RDAP autnum/432, hanscom.af.mil (754 ELSG coverage), bgp.he.net/AS432

Related ASNs

sits within the flat block AFCONC-BLOCK1-AS spanning AS379–AS508 (RDAP startAutnum 379 / endAutnum 508) [Confirmed] — ARIN RDAP autnum/432

Analyst note

Encountered as a dormant legacy ASN inside a U.S. Air Force bulk block; ARIN's flat-block representation means the RDAP handle reads AS379 and the registration date is a block-level (AS379–508) event rather than an AS432-specific one. The nested REGIS10-ARIN POC registration date (2009-06-24) is a contact-record decoy and was excluded. Clean, unrouted ASN.