AS653

AS653 is a dormant autonomous system number registered under ARIN within a large block allocation, DNIC-ASBLK-00616-00665 (AS616–AS665), assigned to the United States Department of Defense (DoD). The registrant organization handle is USDDD, administered day-to-day by the DoD Network Information Center (DNIC) via DISA Columbus, whose contacts (disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil and disa.columbus.ns.mbx.arin-registrations@mail.mil) appear as the block's noc/technical/abuse and administrative/technical points of contact. ARIN's top-level autnum record shows a registration event dated 1990-04-19 and a most-recent "last changed" event of 2025-09-12, with registry status active. Despite that active registry status, AS653 shows no signs of life on the live Internet: RIPEstat reports it as unannounced, with zero originated IPv4 and IPv6 prefixes and zero visible RIS peers (0 of 326 v4 peers, 0 of 321 v6 peers), and CAIDA AS Rank places it at 79,459 with a customer cone limited to itself (0 prefixes, 0 addresses). No PeeringDB network record exists for AS653, and no public DoD or DISA page documents it directly — consistent with a large block of unused/reserved military ASN space rather than an operationally significant network. No notable public abuse or security signal was found in a survey of Spamhaus, ThreatFox, and NANOG-adjacent sources, though that is an absence finding rather than a confirmed clean record.

Operator

United States Department of Defense (DoD); registrant handle USDDD [Confirmed] — https://rdap.arin.net/registry/autnum/653

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/653

Allocated

1990-04-19 (ARIN top-level autnum registration event for the block); last changed 2025-09-12 [Confirmed, two angles agree: A1 raw RDAP + A3] — https://rdap.arin.net/registry/autnum/653

Org status

ARIN registry status active (record last changed 2025-09-12); BGP-visible announcement status is unannounced/dormant [Confirmed] — https://rdap.arin.net/registry/autnum/653, https://stat.ripe.net/AS653

Website

Unknown / none found — no public disa.mil or defense.gov page documents this specific ASN [Confirmed-absence]

Security/abuse context

no notable public abuse signal found as of 2026-07-17 across Spamhaus, ThreatFox, and NANOG-adjacent sources; this is an absence finding, not a confirmed clean record — authenticated/paid threat-intel platforms were not queried

Network & routing

Network type

government/military network infrastructure allocation, not a commercial ISP or content network [Confirmed] — https://rdap.arin.net/registry/autnum/653

Routing/peering

NOT announced — 0 IPv4/IPv6 prefixes, 0 RIS peers seeing it, 0 observed neighbours; no PeeringDB net record for AS653 [Confirmed] — https://stat.ripe.net/AS653, https://www.peeringdb.com/api/net?asn=653

Peering policy

Unknown — not published anywhere publicly [Confirmed-absence] — https://www.peeringdb.com/api/net?asn=653

CAIDA AS rank

79,459; customer cone = singleton (1 ASN, 0 prefixes, 0 addresses) [Confirmed] — https://asrank.caida.org/asns/653

RPKI

not assessable — AS653 announces no prefixes, so there are no ROAs to validate [Unknown, correctly reported as not-applicable] — https://stat.ripe.net/AS653

Geo footprint

US — Columbus/Whitehall, Ohio (DISA-Columbus registrant/POC address); CAIDA lat/long are unset placeholders (0,0), not real coordinates [Confirmed] — https://rdap.arin.net/registry/autnum/653, https://asrank.caida.org/asns/653

Notable usage

per third-party aggregator ipinfo.io (not operator-official) — no active IPv4/IPv6 prefixes, no hosted domains, zero peers/upstreams/downstreams, classified inactive [Likely, single-source] — https://ipinfo.io/AS653

Administering entity

DoD Network Information Center (DNIC), administered via DISA Columbus (contacts disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil, disa.columbus.ns.mbx.arin-registrations@mail.mil) [Confirmed] — https://rdap.arin.net/registry/autnum/653

Assignment

part of block DNIC-ASBLK-00616-00665 (AS616–AS665), anchor handle AS616; ARIN registers this range as one block record rather than a distinct autnum object per ASN [Confirmed] — https://rdap.arin.net/registry/autnum/653

Analyst note

one angle (A5, single-source, uncorroborated) reported an operator variant "Navy Network Information Center (NNIC)" and designation "PENS-NET-AS"; this conflicts with the two-angle-confirmed ARIN registrant (DoD/USDDD) and is not carried into the JSON as a confirmed fact.