AS429

AS429 is a legacy autonomous system number registered under ARIN to the U.S. Department of Defense. In ARIN's registry it does not resolve to a standalone per-ASN record; a lookup of autnum/429 returns the block record AFCONC-BLOCK1-AS (handle AS379), which spans the contiguous range 379–508 and is registered to "Air Force Systems Networking" (organization handle 7ESG, 501 East Moore Dr., Gunther Annex, Maxwell AFB, Alabama). The abuse, administrative, and technical point of contact of record is DISA Columbus — the Defense Information Systems Agency office in Whitehall, Ohio — reachable at disa.columbus.ns.mbx.arin-registrations@mail.mil. The key triage point for AS429 is that it is dormant: it announces nothing to the global routing table. RIPEstat reports announced:false with zero IPv4 and zero IPv6 prefixes over the queried window (2000–2026) and zero RIS peers observing it out of 324 (v4) / 320 (v6). CAIDA AS Rank corroborates this with rank #79459, seen:false, a singleton customer cone (numberAsns:1, 0 prefixes, 0 addresses), and an AS degree of zero across customer, peer, and provider. There is no PeeringDB entry, no IXP membership, and no standalone public website for this military block. RPKI posture cannot be assessed because there are no announced prefixes and therefore no ROAs to validate. No notable public abuse signal was found as of 2026-07-02 — Scamalytics rates the "Air Force Systems Networking" ISP grouping at 0/100 (low fraud risk), and no Spamhaus/UCEPROTECT/NANOG hit surfaced — consistent with a clean, reserved-but-dormant DoD allocation.

Operator

Air Force Systems Networking (ARIN org handle 7ESG; U.S. Department of Defense / U.S. Air Force), Maxwell AFB, AL [Confirmed] — https://rdap.arin.net/registry/autnum/429

Country / RIR

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

Allocated

1989-08-04 (ARIN RDAP autnum top-level registration event for the AFCONC-BLOCK1-AS block that contains AS429, NOT an IEEE date); last changed 2008-06-06 [Confirmed] — https://rdap.arin.net/registry/autnum/429 (top-level events[])

Org status

active registration in ARIN's database (status: active) for the containing block; reflects registration validity, not confirmed current routing [Confirmed] — https://rdap.arin.net/registry/autnum/429

Contacts

abuse/admin/tech DISA Columbus — disa.columbus.ns.mbx.arin-registrations@mail.mil; +1-844-347-2457 ext2; 300 North James Road, Whitehall, OH 43213; registrant HQ Gunther Annex, Maxwell AFB, AL 36114 [Confirmed] — https://rdap.arin.net/registry/autnum/429

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-02; Scamalytics rates the "Air Force Systems Networking" ISP grouping 0/100 (low fraud risk); no confirmed Spamhaus ASN-DROP / UCEPROTECT / NANOG listing surfaced (search-indexed check, not a live-feed query, so a live not-listed status is Unknown)

Network & routing

Network type

U.S. military/government legacy ASN block (Department of the Air Force), registry-administered by DISA Columbus; not a commercial ISP or IXP participant [Likely] — https://ipinfo.io/AS429

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 announced:false, 0 RIS peers seeing it (0/324 v4, 0/320 v6); CAIDA degree total 0 (customer 0, peer 0, provider 0); 0 observed neighbours; no PeeringDB entry / no published peering policy [Confirmed] — https://stat.ripe.net/AS429, https://asrank.caida.org/asns/429

RPKI

not assessable — AS429 announces no prefixes, so there are no ROAs to validate [Unknown] — RIPEstat rpki-validation skipped (no announced prefix)

Notable usage

no current announced prefixes or hosted domains found; appears reserved/dormant, typical of historic DoD AS allocations [Likely] — https://ipinfo.io/AS429

Registry name / block

AFCONC-BLOCK1-AS, block range 379–508 (autnum/429 resolves into this ARIN block, not a per-429 record) [Confirmed] — https://rdap.arin.net/registry/autnum/429

Analyst note

Encountered as a dormant legacy DoD ASN; ARIN's autnum/429 lookup resolves into the 379–508 AFCONC-BLOCK1-AS block rather than a standalone AS429 record, so the allocation/last-changed dates are the block-level top-level events. Clean, unannounced ASN.