AS433

AS433 is a legacy autonomous system number registered under ARIN to Air Force Systems Networking, a U.S. Department of Defense / U.S. Air Force organization administered by DISA-Columbus. It is not individually resolvable in ARIN RDAP: it falls inside a single contiguous block allocation, AFCONC-BLOCK1-AS, spanning AS379 through AS508, registered as one unit to the Air Force registrant (ARIN org handle 7ESG, Air Force Systems Networking, Maxwell AFB, Gunter Annex, Alabama). The registrant postal address is 501 East Moore Dr., Bldg 884 Rm 1100, Gunther Annex, Maxwell AFB, AL 36114, and the administrative/technical/abuse contact is DISA-Columbus (300 North James Road, Whitehall, OH 43213), abuse mailbox disa.columbus.ns.mbx.arin-registrations@mail.mil. The key triage point for AS433 is that it is dormant today: every routing source consulted (RIPEstat routing-status, RIPEstat announced-prefixes, CAIDA AS Rank) agrees it announces zero IPv4 and zero IPv6 prefixes, has zero visible BGP peers, zero upstreams, zero customers, and no IXP membership. Its CAIDA AS rank of 79,459 sits near the bottom of the global ranking, reflecting complete routing inactivity, and its customer cone is a singleton (the ASN itself, 0 prefixes, 0 addresses). The only historical routing evidence is a single brief announcement of 132.8.0.0/16 by origin AS433, first seen 2001-09-26 and last seen 2001-10-23; nothing has been observed since. RPKI posture cannot be assessed because there are no active originations and therefore no live route to validate against a ROA. Community sources (per A5) further associate the AFCONC block with the USAF 754th Electronic Systems Group at Gunter Annex, though that unit attribution is secondary and not registry-confirmed at the AS433 level. No notable public abuse signal was found as of 2026-07-02 — not in Spamhaus resources, NANOG archives, BGP hijack/route-leak discussion, or general threat intelligence — consistent with a clean, dormant, unrouted DoD ASN.

Operator

Air Force Systems Networking (U.S. DoD / U.S. Air Force; ARIN org handle 7ESG; administered by DISA-Columbus) [Confirmed] — ARIN RDAP autnum (block AS379–508), https://rdap.arin.net/registry/autnum/433

Country / RIR

US, ARIN [Confirmed] — RIPEstat abuse-contact-finder (authoritative_rir: arin), https://stat.ripe.net/data/abuse-contact-finder/data.json?resource=433

Allocated

1989-08-04 (ARIN RDAP autnum top-level 'registration' event for the AFCONC-BLOCK1-AS block that covers AS433 — a first-party RIR registry fact, NOT an IEEE date); last changed 2008-06-06 [Confirmed] — ARIN RDAP autnum top-level events, https://rdap.arin.net/registry/autnum/433

Block context

AS433 is registered as part of a single ARIN block allocation, handle AS379, name AFCONC-BLOCK1-AS, startAutnum 379 / endAutnum 508; ARIN does not register sub-ranges individually within this legacy block [Confirmed] — ARIN RDAP, https://rdap.arin.net/registry/autnum/433

Org status

registration status 'active' at the covering ARIN block level (AFCONC-BLOCK1-AS, AS379–508); not individually BGP-routed — third-party data indicates currently unrouted [Confirmed] — https://rdap.arin.net/registry/autnum/433

Contacts

abuse disa.columbus.ns.mbx.arin-registrations@mail.mil (DISA-Columbus, 300 North James Road, Whitehall, OH 43213); registrant 501 East Moore Dr., Bldg 884 Rm 1100, Gunther Annex, Maxwell AFB, AL 36114 [Confirmed] — RIPEstat abuse-contact-finder + ARIN RDAP, https://rdap.arin.net/registry/autnum/433

Website

Unknown — no dedicated operator-official website found; af.mil is a general USAF public-affairs site with no ASN/network-ops content and no PeeringDB network record exists for AS433 [Unknown] — https://www.af.mil, https://www.peeringdb.com/

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-02 — not in Spamhaus DROP/EDROP, NANOG archives, BGP hijack incident reports, or general threat intel; an unrouted ASN generates no traffic and has no abuse footprint

Network & routing

Network type

U.S. government/military network (DoD / U.S. Air Force, administered by DISA), not a commercial ISP; dormant/unrouted [Likely] — ARIN RDAP + https://ipinfo.io/AS433

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, https://stat.ripe.net/data/routing-status/data.json?resource=433

Routing/peering

NOT announced — 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 visible in any source [Confirmed]. No PeeringDB record and no published peering policy

[Unknown for policy] — https://stat.ripe.net/data/routing-status/data.json?resource=433, https://www.peeringdb.com/

RPKI

not assessable — AS433 announces no prefixes, so there are no ROAs to validate (RIPEstat rpki-validation requires a --prefix and there is no live route) [Unknown]

Notable usage

none observed — no hosted domains, no announced prefixes, no pingable hosts per third-party aggregator [Likely] — https://ipinfo.io/AS433

Historical announcement

single window — prefix 132.8.0.0/16, origin AS433, first seen 2001-09-26, last seen 2001-10-23; nothing since [Confirmed] — https://stat.ripe.net/data/routing-status/data.json?resource=433

Community context

A5 associates the AFCONC block with the USAF 754th Electronic Systems Group at Gunter Annex, AL (secure DoD combat information systems); secondary attribution, not registry-confirmed at the AS433 level [Likely] — https://www.hanscom.af.mil/News/Article-Display/Article/381978/754-elsg-division-shapes-supports-it-purchases-across-dod/, https://ipinfo.io/AS433

Analyst note

Encountered as a dormant legacy ASN inside a contiguous DoD/USAF ARIN block (AS379–508). WHOIS/RDAP resolves to Air Force Systems Networking; live routing is inactive. Facts about "AS433 specifically" beyond the block registration date and covering-org identity are honest sourced nulls, not fabrications. Clean, inactive ASN.