AS665

AS665 is an active autonomous system registered to the United States Department of Defense (DoD), part of the ARIN DNIC-ASBLK-00616-00665 block administered by DISA, and it currently announces 41 IPv4 prefixes covering roughly 144,000 addresses with no IPv6 space. Unlike some neighboring legacy DoD ASNs, AS665 is not dormant — it is live-routing today.

ARIN RDAP records the block's top-level registration event as 1990-04-19, with a last-changed date of 2025-09-12. AS665 is not individually RDAP-numbered; it is registered as part of a block object spanning AS616 through AS665, so this allocation date technically covers the whole block rather than AS665 alone.

The registrant is the U.S. Department of Defense (ARIN org handle USDDD), with day-to-day NOC, technical, and abuse contact duties handled by DISA-Columbus in Whitehall, Ohio. DISA operates the Defense Information Systems Network (DISN), the parent infrastructure this allocation almost certainly supports. No PeeringDB record or public peering policy exists for AS665, consistent with a closed government network.

BGP monitors show two observed peers, AS27064 and AS27066, both DoD/DISA-registered ASNs — but bgp.he.net and bgp.tools disagree on whether these are true peers or transit upstreams, so the relationship stays unconfirmed. CAIDA ASRank places AS665 at 12936; no customer-cone AS count was captured alongside that rank. RPKI validation finds no ROA at all: Routinator, queried through RIPEstat, returns status "unknown" with no validating ROAs for the two largest announced prefixes, so AS665's routes are RPKI-NotFound rather than valid or invalid.

Third-party IP-intelligence databases (ipinfo.io, NetworksDB) associate part of this address space with the Navy Network Information Center (NNIC) in Virginia Beach, Virginia, but no DoD or Navy official source confirms that link, so it stays a Likely rather than Confirmed attribution.

Operator

United States Department of Defense (DoD); ARIN org handle USDDD, part of DNIC-ASBLK-00616-00665 [Confirmed] — https://rdap.arin.net/registry/autnum/665

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/665

Allocated

1990-04-19 (ARIN RDAP top-level autnum registration event for block DNIC-ASBLK-00616-00665, which spans AS616–AS665 and includes AS665); last changed 2025-09-12 [Confirmed] — https://rdap.arin.net/registry/autnum/665, https://bgp.tools/as/665

Org status

Active (ARIN autnum status "active", canAllocate: Yes) [Confirmed] — https://rdap.arin.net/registry/autnum/665

Contacts

DISA-Columbus NOC/technical/abuse (handle MIL-HSTMST-ARIN), 300 North James Road, Whitehall, OH 43213; disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil [Confirmed] — https://rdap.arin.net/registry/autnum/665

Website

Unknown — no dedicated public operator site confirmed for AS665; disa.mil content not reliably fetchable this session [Unknown] — https://www.disa.mil/

Security/abuse context

no notable public abuse signal found as of 2026-07-18; CleanTalk shows a 0.00% spam rate across sampled prefixes; no Spamhaus/Talos listings located; URLhaus ASN page unverifiable behind a bot-check wall; bogon-range announcements observed on BGP monitors, plausibly intentional for DoD operations

Network & routing

Network type

government/military administrative network (DoD internal use), closed to public peering [Likely] — https://bgp.tools/as/665

Size

41 IPv4 prefixes announced (~144,128 addresses, ~562–563 /24-equivalents), 0 IPv6 prefixes [Likely] — https://bgp.he.net/AS665, https://bgp.tools/as/665 (RIPEstat announced-prefixes feed supplied this cycle was truncated mid-array)

Routing/peering

2 BGP-observed peers, AS27064 (DISA/DoD Network Information Center) and AS27066 (DoD) — bgp.he.net and bgp.tools disagree on whether these are peers or transit upstreams; no PeeringDB record, no published peering policy [Unknown] — https://bgp.he.net/AS665, https://bgp.tools/as/665

RPKI

unsigned (NotFound) — RIPEstat's rpki-validation endpoint, validator Routinator, returns status "unknown" with an empty validating_roas[] for AS665's two largest announcements, 138.163.0.0/16 and 205.85.112.0/20, as of 2026-07-28: no ROA covers either, so they are RPKI-NotFound rather than valid or invalid, and no ROA naming AS665 as origin surfaced in either query [Confirmed for the two prefixes validated; Likely for the remaining announcements] — https://stat.ripe.net/data/rpki-validation/data.json?resource=AS665&prefix=138.163.0.0/16, https://stat.ripe.net/data/rpki-validation/data.json?resource=AS665&prefix=205.85.112.0/20

CAIDA AS rank / customer cone

CAIDA ASRank 12936; no customer-cone AS count was captured — the cone figure recorded alongside the rank is 41 announced prefixes, which is a prefix count, not a cone size in ASes [Likely] — this site's own enrichment records AS665 (CAIDA capture recorded by this pipeline 2026-07-18; not re-queried against CAIDA this pass)

Notable usage

third-party IP-intelligence sources (ipinfo.io, NetworksDB) associate this address space with the Navy Network Information Center (NNIC), Virginia Beach, VA; not confirmed on any DoD/Navy official page

[Likely] — https://ipinfo.io/AS665, https://networksdb.io/ip-addresses-of/navy-network-information-center-nnic

Parent operating agency

Defense Information Systems Agency (DISA), operating the Defense Information Systems Network (DISN) [Confirmed] — https://en.wikipedia.org/wiki/Defense_Information_Systems_Agency

Registry object scope

AS665 is not individually RDAP-numbered — it is registered as part of an ARIN block object (RDAP handle "AS616") spanning startAutnum 616 to endAutnum 665; the allocated_date above applies to the whole block [Confirmed] — https://rdap.arin.net/registry/autnum/665

Analyst note

distinct from AS8003 ("GRS-DoD"), which generated 2021 NANOG discussion for a separate Defense Digital Service BGP pilot program unrelated to AS665 — do not conflate the two in the published entry.