AS369

AS369 is a legacy autonomous system number registered under ARIN to the United States Department of Defense (DoD). It is not an independently-scoped ARIN object: the registry represents AS306 through AS371 as a single combined autnum record named DNIC-ASBLK-00306-00371 (startAutnum 306, endAutnum 371), so AS369 shares that block record's top-level registration event of 1989-06-30 and its 2025-09-12 last-changed timestamp. The registrant is ARIN organization handle USDDD — "United States Department of Defense (DoD)," at 3990 E. Broad Street, Columbus, OH 43218 — with the DoD Network Information Center (DNIC) at DISA-Columbus, 300 North James Road, Whitehall, OH 43213 serving as the technical/NOC/abuse contact via email (disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil) rather than any public website. Unlike the dormant end of the DoD number range, AS369 is actively announced: RIPEstat reports announced=true, and routing-status confirms a small footprint of 55 IPv4 prefixes covering 131,072 addresses (a /16 equivalent) plus 1 IPv6 prefix, drawn from the DoD-owned 55.50.0.0/16 and 55.91.0.0/16 ranges (e.g. 55.50.198.0/24, 55.91.192.0/24, 55.91.204.0/24). CAIDA ASRank places AS369 at global rank 13087 with a customer cone of 1 ASN / 56 prefixes / 131,072 addresses and an AS-degree of 1 (provider=1, peer=0, customer=0) — the profile of a single-homed stub government network rather than a transit or content AS. No dedicated operator website, PeeringDB profile (peeringdb.com/asn/369 returns 404), or public BGP peering policy exists for AS369 specifically, consistent with military/government operational security. No notable public abuse or threat signal was found as of 2026-07-01 across Spamhaus, abuse.ch, AbuseIPDB, and NANOG/seclists archives — an absence-of-evidence finding, not a certified clean bill of health.

Operator

United States Department of Defense (DoD); ARIN org handle USDDD; DoD Network Information Center (DNIC) as technical/NOC/abuse contact (DISA-Columbus) [Confirmed] — ARIN RDAP autnum/369

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP autnum/369; RIPEstat as-overview (block "Assigned by ARIN")

Allocated

1989-06-30 (ARIN RDAP top-level autnum registration event for the DNIC-ASBLK-00306-00371 block record; a first-party RIR fact, NOT an IEEE/OUI date); last changed 2025-09-12 [Confirmed] — ARIN RDAP autnum/369 top-level events[]

Block context

AS369 is one number within ARIN's single combined autnum record for startAutnum 306 → endAutnum 371 (DNIC-ASBLK-00306-00371), all registered to US DoD; entity handles (USDDD, MIL-HSTMST-ARIN, REGIS10-ARIN) carry their own distinct dates unrelated to the ASN's allocation event

[Confirmed] — ARIN RDAP autnum/369

Org status

active — ARIN RDAP status for the parent autnum record is "active" [Confirmed] — ARIN RDAP autnum/369

Website

none dedicated to AS369; contact is email/phone only via DoD NIC; disa.mil currently redirects to an unrelated parked page and cannot be cited as an authoritative operator page [Confirmed] — ARIN RDAP autnum/369; disa.mil

IANA reference

blank — no IANA RFC reference applies to this ASN allocation (left blank per convention; not fabricated) [Unknown]

Security/abuse context (NEUTRAL, DATED)

no notable public abuse/threat signal found as of 2026-07-01 — not in Spamhaus, abuse.ch (URLhaus/ThreatFox), AbuseIPDB, or NANOG/seclists archives; absence-of-evidence, not a certified audit

Network & routing

Network type

government/military network infrastructure block, not a commercial ISP, transit, or content network [Confirmed] — ARIN RDAP autnum/369

Size

55 IPv4 prefixes announced (131,072 addresses, /16-equivalent) and 1 IPv6 prefix, per RIPEstat routing-status announced_space [Confirmed] — RIPEstat routing-status (fetch-canonical --id 369 --max-bytes 0)

Routing/peering

announced=true per RIPEstat as-overview; routing-status confirms v4 prefixes=55, v4 ips=131072, v6 prefixes=1; sample announced prefixes include 55.50.198.0/24, 55.91.192.0/24, 55.91.204.0/24, 55.91.220.0/24, 55.50.191.0/24, 55.91.226.0/24, 55.91.191.0/24, 55.91.205.0/24, 55.91.203.0/24 (all within DoD-owned 55.50.0.0/16 and 55.91.0.0/16)

[Confirmed] — RIPEstat routing-status; announced-prefixes; as-overview

AS rank / customer cone

CAIDA ASRank rank=13087; customer cone = 1 ASN / 56 prefixes / 131,072 addresses (AS-degree: provider=1, peer=0, customer=0), consistent with a single-homed stub network [Confirmed] — CAIDA ASRank (fetch-canonical --id 369 --max-bytes 0)

Peering policy

Unknown / not publicly documented for AS369; no PeeringDB record (peeringdb.com/asn/369 → HTTP 404) [Confirmed absence] — peeringdb.com/asn/369

RPKI

Unknown — RIPEstat rpki-validation requires a per-prefix argument and was self-skipped; a per-prefix check (e.g. 55.50.198.0/24) would be needed to assess ROA coverage [Unknown] — RIPEstat rpki-validation

Notable usage

AS369 falls within the DoD's historic DNIC ASN block (306–371) for U.S. military/government network routing; distinct from later, more visible DoD ASNs. Sector context (not AS369-specific): a sibling DoD-block ASN, AS8003, drew NANOG attention in 2021 when it began originating dormant DoD IPv4 space as an authorized Defense Digital Service pilot

[Likely for sector context] — kentik.com/blog/the-mystery-of-as8003

Community corroboration (A5)

NANOG mailing-list archives searched (seclists.org/nanog, mailman.nanog.org) for operator mentions, outages, and reputation signals; no AS369-specific incidents, routing anomalies, or abuse reports found. Absence-of-evidence is neutral; no reputation signal (positive or negative) is available from operator communities as of 2026-07-01

[Unknown] — seclists.org/nanog, mailman.nanog.org

Analyst note

block-level ARIN record shared across AS306–AS371 for US DoD/DISA-Columbus; the 1989-06-30 registration is the block's top-level event and applies to AS369. Actively announced with a confirmed small footprint (55 v4 prefixes / 131,072 addresses, 1 v6 prefix; CAIDA rank 13087, cone of 1 ASN), but no public peering/RPKI detail is available.