AS322

AS322 is a legacy autonomous system number registered under ARIN to the United States Department of Defense (DoD), part of the contiguous DNIC-ASBLK-00306-00371 block (AS306–AS371) assigned to the DoD Network Information Center. The block's ARIN RDAP autnum carries a top-level registration event of 1989-06-30, making AS322 one of the early military allocations dating to the formative years of the modern Internet; the block record was last changed 2025-09-12. Operationally AS322 is a single-homed stub AS: it originates two IPv4 prefixes (55.35.0.0/16 and the more-specific 55.35.124.0/24, ~65,536 addresses) and one IPv6 prefix (2608:14a:3900::/40), with AS306 (also DoD) as its sole observed neighbour, upstream, and peer. The 55.0.0.0/8 space is historically DoD-reserved, and bgp.he.net flags the announcements accordingly. Routing has been continuously visible to RIS since first-seen 2008-08-29, with last-seen 2026-06-26 and near-total RIS visibility (324/326 v4 peers, 323/323 v6). No public peering policy exists — the DoD does not publish open BGP peering, and PeeringDB carries no network record for AS322. Abuse contact is DISA-Columbus (disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil), reflecting the Defense Information Systems Agency's stewardship of the DNIC block. No notable public abuse signal was found as of 2026-06-28: AS322 is absent from Spamhaus ASN-DROP, CleanTalk shows zero records, and reputation databases rate it low-risk — consistent with a non-public-facing federal/military network.

Operator

United States Department of Defense (DoD); DoD Network Information Center (DNIC), ARIN org handle USDDD [Confirmed] — ARIN RDAP autnum/322, ipinfo.io/AS322, db-ip.com/as322

Country / RIR

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

Allocated

1989-06-30 (ARIN RDAP autnum top-level registration event for block DNIC-ASBLK-00306-00371; a first-party RIR fact, NOT an IEEE date); block last changed 2025-09-12 [Confirmed] — ARIN RDAP autnum/322 top-level events

Org status

active; registered entity United States Department of Defense (DoD); administrative/NOC/abuse contact managed by DISA-Columbus (Defense Information Systems Agency, Columbus, OH) [Confirmed] — ARIN RDAP autnum/322

Contacts

disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil; org address 3990 E. Broad Street, Columbus, OH 43218; NOC/Technical DISA-Columbus, 300 North James Road, Whitehall, OH 43213 [Confirmed for abuse via RIPEstat; Likely for postal addresses via RDAP mirrors] — ARIN RDAP, RIPEstat abuse-contact-finder

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-28 — not in Spamhaus ASN-DROP (2026-05-29 edition), CleanTalk shows 0 blacklisted / 0% spam, no AS322-specific NANOG thread (the 1996 jvnc.net thread cites AS97/AS262, not AS322), reputation databases rate it low-risk

Network & routing

Network type

U.S. federal government / military; single-homed stub AS within the DoD's DNIC ASN block (AS306–AS371) [Confirmed] — bgp.tools/as/322, ipinfo.io/AS322

Size

~65,536 IPv4 addresses (one /16; the /24 is a more-specific covered by that /16) and one /40 IPv6 (256 /48 blocks) [Confirmed] — bgp.he.net/AS322, bgp.tools/as/322

Routing/peering

announces 2 IPv4 prefixes (55.35.0.0/16, 55.35.124.0/24) and 1 IPv6 prefix (2608:14a:3900::/40); 1 upstream and sole observed neighbour AS306 (DoD); first-seen 2008-08-29, last-seen 2026-06-26; RIS visibility 324/326 v4, 323/323 v6

[Confirmed] — RIPEstat announced-prefixes / routing-status, bgp.he.net/AS322, bgp.tools/as/322

AS rank / customer cone

Unknown — CAIDA AS Rank API returned HTTP 502 and bgp.tools published no rank; not assessable this cycle [Unknown] — api.asrank.caida.org (502)

RPKI

no RPKI-valid originated routes observed; announced prefixes appear unROA'd; RIPEstat RPKI-validation skipped (no --prefix supplied) [Likely] — bgp.he.net/AS322

Notable usage

internal U.S. DoD network; 55.35.0.0/16 is DoD-assigned space (the 55/8 Class A is historically DoD-reserved, hence bgp.he.net's bogon flag); carries defense network traffic largely within DoD's private DISN infrastructure; not public-facing [Likely] — bgp.tools/as/322, ipinfo.io/AS322

Related ASNs

AS306 (United States Department of Defense) — block anchor, sole upstream/peer; the full DNIC block spans AS306–AS371 [Confirmed] — bgp.he.net/AS322, ARIN RDAP

Analyst note

AS322 is one AS within the DoD's DNIC-ASBLK-00306-00371 block; ARIN serves the block record under the AS306 handle, so AS322 has no independently published record beyond the block. allocated_date 1989-06-30 was read from the autnum TOP-LEVEL registration event; entity/contact dates (1993-05-26, 2009-06-24) are decoys and were ignored. CAIDA was unavailable (502); managing-agency site disa.mil was unreachable this session but is cited from the DISA-Columbus contact domain.