AS332

AS332 is a legacy autonomous system number registered under ARIN to the United States Department of Defense (DoD). It is allocated as part of the contiguous block DNIC-ASBLK-00306-00371, spanning AS306 through AS371, administered by the DoD Network Information Center (DNIC) and operated by the Defense Information Systems Agency (DISA) out of the DISA-Columbus facility in Ohio. ARIN does not model AS332 as a standalone object: the autnum record returned for /registry/autnum/332 is the block record (handle AS306, org handle USDDD), whose top-level ARIN registration event is dated 1989-06-30 — a first-party RIR fact serving as the allocation date for the numbers in the block. AS332 is effectively dormant: every routing source consulted (RIPEstat as-overview, routing-status, announced-prefixes, bgp.he.net, bgp.tools) agrees it announces zero IPv4 and zero IPv6 prefixes as of June 2026, and it is seen by 0 of 326 RIS peers (v4) and 0 of 324 (v6). Historical RIS data shows the first prefix seen was 55.71.0.0/16 on 2009-11-24 and the last was 55.20.0.0/16 on 2020-04-27, after which the ASN went dark. CAIDA AS Rank was unavailable (HTTP 502), so AS rank and customer cone could not be assessed. A Bangladeshi Progoti-IT artifact (103.106.32.0/24–103.106.35.0/24 via AS137252) appears in bgp.he.net historical scrape data but is absent from authoritative RIPE RIPEstat routing-status and is assessed as a database artifact, not legitimate DoD routing. Community corroboration via NANOG archives and Reddit's r/networking shows zero indexed mentions, and no notable public abuse signal was found as of 2026-06-28 — clean across CleanTalk, Spamhaus ASNDROP, AbuseIPDB, ipapi.is, and Qrator Radar (0 hijacks/leaks/bogons) — consistent with a dormant, reserved legacy DoD ASN.

Operator

United States Department of Defense (DoD); administered by the DoD Network Information Center (DNIC), operated by DISA out of DISA-Columbus, OH; ARIN org handle USDDD [Confirmed] — ARIN RDAP autnum/332, bgp.he.net/AS332, bgp.tools/as/332

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP autnum/332; RIPEstat abuse-contact-finder (authoritative_rir: arin)

Allocated

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

ASN block

DNIC-ASBLK-00306-00371 (AS306–AS371); ARIN returns the block record for /autnum/332 (handle AS306), registrant United States Department of Defense (DoD), org handle USDDD [Confirmed] — ARIN RDAP autnum/332, bgp.tools/as/332

Org status

active ARIN registrant (block status active), United States Department of Defense (DoD), org handle USDDD; administered via DNIC at DISA-Columbus; ASN itself dormant in BGP [Confirmed] — ARIN RDAP autnum/332, bgp.he.net/AS332

Contacts

abuse/hostmaster disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil; +1-844-347-2457 ext 2 (handle MIL-HSTMST-ARIN); registrant 3990 E. Broad Street, Columbus, OH 43218; NOC DISA-Columbus, 300 North James Road, Whitehall, OH 43213 [Confirmed] — ARIN RDAP autnum/332, RIPEstat abuse-contact-finder

Security/abuse context (NEUTRAL, CLEAN)

no notable public abuse signal found as of 2026-06-28 — CleanTalk 0.00% spam rate, absent from Spamhaus ASNDROP and ipapi.is most-abusive top-1000, no AbuseIPDB AS page; Qrator Radar shows 0 hijacks, 0 leaks, 0 bogons

Network & routing

Network type

U.S. federal government / military network; AS332 is a reserved/legacy DoD ASN currently inactive in global BGP. DISA manages the Defense Information Systems Network (DISN), including NIPRNet/SIPRNet [Confirmed for DoD/DISA registrant; Likely for the DISN association] — bgp.he.net/AS332, en.wikipedia.org/wiki/Defense_Information_Systems_Agency

Size / routing

dormant — 0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes; not announced (announced=false); 0 of 326 RIS peers seeing v4, 0 of 324 v6; 0 observed neighbours [Confirmed] — RIPEstat as-overview / routing-status / announced-prefixes (2026-06-28), bgp.tools/as/332

Routing history

first RIS prefix 55.71.0.0/16 on 2009-11-24; last 55.20.0.0/16 on 2020-04-27; dark since ~April 2020 [Confirmed] — RIPEstat routing-status

Peering

no public peering policy; no PeeringDB record for AS332 (DoD/DISN connectivity governed by internal DISA policy, not a commercial peering policy) [Confirmed for absence of PeeringDB] — peeringdb.com/asn/332

RPKI

not assessable — AS332 announces no prefixes, so there are no ROAs to validate; RIPEstat rpki-validation skipped (no active prefix) [Unknown/not assessable] — RIPEstat rpki-validation (skipped)

AS rank / customer cone

Unknown — CAIDA AS Rank API returned HTTP 502 [Unknown] — api.asrank.caida.org

Notable usage / artifact

bgp.he.net historical data shows Bangladeshi Progoti-IT prefixes (103.106.32.0/24–103.106.35.0/24) via AS137252; absent from RIPEstat routing-status and assessed as a database/hijack artifact, not legitimate DoD use [Likely] — bgp.he.net/AS332, RIPEstat routing-status

Community corroboration (NANOG / Reddit)

no indexed discussions found; NANOG mailing-list archives contain no AS332-specific threads and r/networking shows zero mentions [Confirmed for absence] — nanog.org search, reddit.com/r/networking search

Analyst note

Encountered as a dormant/reserved ASN inside the contiguous DoD block AS306–AS371; /autnum/332 resolves to the block record (handle AS306, registrant DoD) rather than a per-ASN object. AS332 announces nothing in global BGP since ~2020. CAIDA 502 left rank/cone unknown. Community corroboration shows no NANOG/Reddit discussion and no abuse signals. Clean, inactive.