AS658

AS658 is a legacy autonomous system number held within ARIN's DNIC-ASBLK-00616-00665 registration — a single block spanning AS616 through AS665 — assigned to the United States Department of Defense (DoD) under organization handle USDDD. Unlike a standalone ASN, AS658 has no individual RDAP or WHOIS record of its own; the RDAP object ARIN returns for it is the shared block record, administered on the registry side by DISA-Columbus. The block's top-level registration event dates to 1990-04-19, placing it among the earliest DoD Internet-era allocations, alongside a 2025-09-12 last-changed timestamp on that same record. Operationally, AS658 is dormant: every routing source checked — RIPEstat, CAIDA AS Rank, bgp.he.net, and bgp.tools — agrees it originates zero IPv4 and zero IPv6 prefixes, has no visible peers or upstreams, and carries a singleton customer cone. No PeeringDB entry exists for it, and it should not be confused with AS27081 (a separately peering DoD ASN) or AS8003 (the 2021 Global Resource Systems dormant-space announcement). No AS658-specific abuse or threat signal was found in any searched source as of mid-July 2026.

Operator

United States Department of Defense (DoD), org handle USDDD [Confirmed] — https://rdap.arin.net/registry/autnum/658

Country / RIR

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

Block context

AS658 has no individual RDAP record; it is part of DNIC-ASBLK-00616-00665 (AS616–AS665), a single ARIN autnum object [Confirmed] — https://rdap.arin.net/registry/autnum/658

Allocated

1990-04-19 (ARIN RDAP autnum top-level "registration" event on the block record; NOT an IEEE date and NOT nulled as a database artifact — this is the first-party RIR registration fact); last changed 2025-09-12 [Confirmed] — https://rdap.arin.net/registry/autnum/658, corroborated independently by https://bgp.tools/as/658 ("registered on April 19, 1990")

Org status

active ARIN registration (block-level); administered by DISA-Columbus, 300 North James Road, Whitehall, OH 43213 [Confirmed] — https://rdap.arin.net/registry/autnum/658

Contacts

abuse — disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil [Confirmed] — RIPEstat abuse-contact-finder (resource=658)

Website

Unknown — no AS658-specific operator page found; nic.mil is the DoD NIC's general portal but is not AS658-specific [Unknown]

Security/abuse context (NEUTRAL, DATED)

no AS658-specific abuse, threat-feed, hijack, or NANOG signal found as of 2026-07-17 across Spamhaus, GreyNoise/DShield/Shodan-class, BGPStream/hijack, and NANOG/seclists searches; absence of evidence, not a confirmed clean record; not to be confused with AS8003 (2021 Global Resource Systems / Defense Digital Service dormant-space announcement)

Network & routing

Network type

legacy U.S. military network allocation (Defense Data Network / MILNET era); not commercial; not individually routed [Likely] — https://en.wikipedia.org/wiki/MILNET

Size/routing

dormant — 0 IPv4 and 0 IPv6 announced prefixes; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses; CAIDA AS rank 79459 [Confirmed] — RIPEstat routing-status, CAIDA ASRank API (asn=658), https://bgp.he.net/AS658, https://bgp.tools/as/658

Peering

no PeeringDB record (peeringdb.com/asn/658 returns HTTP 404); do not conflate with AS27081 ("DoD Network Information Center", a separate ASN with an Open PeeringDB policy) [Confirmed] — https://www.peeringdb.com/asn/658

RPKI

not assessable — AS658 announces no prefixes, so there are no ROAs to validate [Confirmed] — RIPEstat rpki-validation (skipped: no --prefix supplied)

Notable usage

Unknown — no AS658-specific documented usage found beyond block membership [Unknown]

Analyst note

dormant, block-level DoD ASN with no individual RDAP identity of its own and no live routing. allocated_date is the block's ARIN RDAP top-level registration event, recorded per instructions rather than nulled as a "database artifact" or "non-IEEE" rationale — it is a first-party RIR fact.