AS150

AS150 is a legacy U.S. military Autonomous System Number registered to the United States Department of Defense and administered by the Defense Information Systems Agency (DISA) through its DoD Network Information Center (DNIC) function. ARIN records it under the organization handle USDDD (3990 E. Broad Street, Columbus, OH), with NOC, technical, and abuse contacts pointing at DISA's Columbus operations center (disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil, +1-844-347-2457). The ARIN registry shows a registration date of January 4, 1988, which makes AS150 one of the oldest ASNs in existence; this is the registry record date and is not an IEEE-published value. The key triage point is the gap between allocation and use: although the number is allocated and ARIN-managed (record last changed 2025-09-12), it is dormant in BGP. RIPEstat reports 0 of 327 IPv4 RIS peers and 0 of 319 IPv6 RIS peers seeing any prefix, and bgp.he.net states AS150 has not been visible in the global routing table since 2023-11-13. CAIDA ranks it 79,459 with a customer cone of one ASN and zero addresses. Three IPv4 prefixes that bgp.he.net lists as historically originated by AS150 (91.213.102.0/24, 146.0.88.0/21, 185.195.88.0/22) are attributed to TRUST INFO s.a.r.l. and flagged as likely stale or bogon database artifacts, not an official DoD announcement. No notable public abuse signal was found as of 2026-06-15: AS150 is not on the Spamhaus ASN-DROP list and shows a 0.00% spam rate at CleanTalk — consistent with an inactive, government-held legacy ASN.

Operator

United States Department of Defense (DoD), administered by DISA via the DoD Network Information Center (DNIC); ARIN OrgId USDDD, Columbus, OH [Confirmed] — ARIN RDAP

Country / RIR

US, ARIN [Confirmed]

Allocated

ARIN AS150 registration 1988-01-04 (registry record date, NOT an IEEE-published date); record last changed 2025-09-12 [Confirmed for the shown dates]

Org status

active US Federal combat-support agency (DISA); the ASN itself is allocated/registered but inactive in BGP since 2023-11-13 [Confirmed]

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-15; not on Spamhaus ASN-DROP; CleanTalk 0.00% spam rate; routing-inactive = minimal abuse surface — spamhaus.org / cleantalk.org

Network & routing

Network type

US Federal Government / Military; legacy DNIC-managed ASN tied to DoD IP/ASN administration (broader DoD network = DISN / NIPRNet + SIPRNet) [Confirmed]

Size

0 currently routed — CAIDA cone 1 ASN / 0 prefixes / 0 addresses; RIPEstat announced_space v4=0 IPs, v6=0 /48s — api.caida.org / stat.ripe.net (2026-06)

Routing/peering

NOT announced; not in the global routing table since 2023-11-13; no observed upstreams (CAIDA provider=0, RIPEstat observed_neighbours=0); peering policy not published (no PeeringDB record for AS150) [Confirmed routing-status; peering policy Unknown]

Notable usage

one of the oldest ASNs (registered 1988), part of the DNIC block historically used to manage DoD routing; DoD operates 20+ other ASNs via USDDD (e.g., AS749, AS138, AS325) — peeringdb.com/org/17705

Related ASNs

other DoD/DISA ASNs under USDDD — AS749, AS138, AS325 [Confirmed via PeeringDB org/17705]

Historical-routing note

RIPEstat first prefix seen 207.0.77.0/24 (2002-12-05), last 185.195.88.0/22 (2023-09-19); bgp.he.net shows 91.213.102.0/24, 146.0.88.0/21, 185.195.88.0/22 attributed to TRUST INFO s.a.r.l. (FR) — likely stale/bogon artifact, not an official DoD announcement [Likely]

Analyst note

Encountered as a historic, government-held legacy ASN; allocated and ARIN-managed but dormant in BGP. RPKI posture unverifiable (no active announcements, no ROAs to validate). Clean, inactive ASN.