AS359

AS359 is a legacy autonomous system number registered under ARIN to the United States Department of Defense (DoD), with registrant handle USDDD. Rather than a discrete per-ASN record, ARIN models AS359 as one member of a flat block, DNIC-ASBLK-00306-00371, spanning AS306 through AS371 and administered on the DoD's behalf by the Defense Information Systems Agency (DISA), specifically the DISA-Columbus field office in Whitehall, Ohio. The block's top-level RDAP registration event dates to 1989-06-30, with the record last changed on 2025-09-12, and its status is active. AS359 is presently and actively announcing: RIPEstat reports a single IPv4 prefix, 55.1.0.0/16 (65,536 addresses, first seen originating from this AS on 2017-05-31), and a single IPv6 prefix, 2608:c1aa:1100::/40. Both prefixes enjoy near-universal BGP visibility (v4 seen by 323/325 RIS peers; v6 by 323/323). CAIDA places AS359 at rank 14,259 with a singleton customer cone (itself only, 1 prefix, 65,536 addresses) and an AS degree of one — a single observed provider relationship, no peers or customers. This is a U.S. federal government/military network, not a commercial ISP, content, or hosting operator. It has no dedicated PeeringDB network object, so its peering policy is not publicly published. No notable public abuse signal was found for AS359 as of 2026-07-01 across the reputable threat/abuse sources checked, consistent with a clean government ASN, though direct Spamhaus ASN-DROP and NANOG archive queries were not accessible in this session and are flagged as such.

Operator

United States Department of Defense (DoD); registrant handle USDDD; administered by DISA-Columbus (Defense Information Systems Agency, Whitehall/Columbus, OH) [Confirmed] — ARIN RDAP autnum/359, ipinfo.io/AS359

Country / RIR

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

Allocated

1989-06-30 (ARIN registry date read from RDAP autnum top-level events, eventAction "registration"; NOT an IEEE date — IEEE publishes no ASN registration dates); last changed 2025-09-12 [Confirmed] — ARIN RDAP autnum top-level events. Note: this is the block-level (DNIC-ASBLK-00306-00371) registration event that covers AS359; entity-level decoy dates (MIL-HSTMST-ARIN 1993-05-26, REGIS10-ARIN 2009-06-24, USDDD org 2007-01-12) were excluded.

Org status

active; ARIN RDAP block status "active"; contacts MIL-HSTMST-ARIN (disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil), REGIS10-ARIN (disa.columbus.ns.mbx.arin-registrations@mail.mil); abuse tel +1-844-347-2457 ext2 [Confirmed] — ARIN RDAP autnum/359, stat.ripe.net/AS359

Contacts

abuse/hostmaster disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil; registrations disa.columbus.ns.mbx.arin-registrations@mail.mil; DISA-Columbus, 300 North James Road, Whitehall, OH 43213, US [Confirmed] — ARIN RDAP autnum/359, RIPEstat abuse-contact-finder

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found for AS359 as of 2026-07-01 — no AS359-specific hits in searches of Spamhaus-adjacent pages, AbuseIPDB, Scamalytics, or NANOG archives; an ISP-level Scamalytics page for "DoD Network Information Center" (spanning many DoD ASNs, not AS359 alone) shows a low fraud-risk score, cited as context only. Direct Spamhaus ASN-DROP and NANOG full-text archive queries were NOT accessible this session

Network & routing

Network type

U.S. federal government / military network (DoD-operated); not a commercial ISP, content, or hosting provider [Confirmed] — ARIN RDAP autnum/359, asrank.caida.org/asns/359

Size

actively announced — 1 IPv4 prefix 55.1.0.0/16 (65,536 addresses; first seen 2017-05-31) and 1 IPv6 prefix 2608:c1aa:1100::/40 (256 /48s); customer cone = 1 ASN (itself), 1 prefix, 65,536 addresses [Confirmed] — stat.ripe.net/AS359, asrank.caida.org/asns/359

Routing/peering

announced=true; v4 seen by 323/325 RIS peers, v6 by 323/323; CAIDA AS degree total 1 (customer 0, peer 0, provider 1); observed_neighbours=1; specific upstream ASN identity not present in the fetched data [Confirmed for counts; upstream identity Unknown] — stat.ripe.net/AS359, asrank.caida.org/asns/359

Peering policy

Unknown / not publicly published — no dedicated PeeringDB network object for AS359 (peeringdb.com/api/net?asn=359 → 404; DoD org page peeringdb.com/org/17705 lists ~20 sibling DoD ASNs but not 359); nic.mil connection refused, disa.mil/about behind an authenticated portal

[Unknown] — peeringdb.com/org/17705

RPKI

Unknown / not evaluated — RIPEstat rpki-validation requires a --prefix parameter that was not supplied in this fetch; no ROA validation state without a targeted re-query against 55.1.0.0/16 or 2608:c1aa:1100::/40 [Unknown]

Geo footprint

Country US (ISO); registrant postal address DISA-Columbus, 300 North James Road, Whitehall, OH 43213 / 3990 E. Broad Street, Columbus, OH 43218; CAIDA geolocation ~lat 31.55, long -110.35 (southern Arizona) — CAIDA AS geo is often registration-metadata-derived and approximate [Likely for CAIDA lat/long; Confirmed for country/address] — asrank.caida.org/asns/359, stat.ripe.net/AS359

Notable usage

No AS359-specific official usage statement found; operator surfaces (nic.mil, disa.mil peering pages) are not publicly fetchable, consistent with a .mil network [Unknown] — (no source; honest null)

Registry block

DNIC-ASBLK-00306-00371 (AS306–AS371), authoritative RIR ARIN, allocated to the U.S. Department of Defense [Confirmed] — ARIN RDAP autnum/359, stat.ripe.net/AS359

Analyst note

Actively-announcing legacy DoD block-member ASN. ARIN resolves autnum/359 to the parent block record (AS306–AS371); the block-level 1989-06-30 registration date is recorded as AS359's allocated_date per RIR convention, not nulled and not an IEEE-style date. Peering policy and RPKI posture are genuine sourced Unknowns.