AS664

AS664 is an actively routed autonomous system allocated to the United States Department of Defense (DoD), administered via the Defense Information Systems Agency (DISA) DoD Network Information Center in Columbus, Ohio, and it is announcing live prefixes today rather than sitting dormant.

The ASN sits inside DNIC-ASBLK-00616-00665 (AS616–AS665), a DoD-reserved block ARIN's RDAP record shows with a top-level registration date of 1990-04-19 and a last-changed date of 2025-09-12. Registrant is the U.S. Department of Defense (handle USDDD), 3990 E. Broad Street, Columbus, OH.

Currently announced routes are 199.211.166.0/23 and 199.211.168.0/23 (two IPv4 prefixes, 1,024 addresses) plus 2608:167:15::/48 (one IPv6 /48), visible to nearly all RIPE RIS peers (324/325 IPv4, 320/320 IPv6). Origination for this ASN was first observed 2009-09-23 and is still current as of 2026-07-18.

RIPEstat reports only one observed BGP neighbor and no PeeringDB net record exists for AS664, consistent with a closed, single-upstream government network rather than one running a public peering policy; the neighbor's identity was not resolvable in this pass. Some third-party aggregators (bgp.he.net, cidr-report.org) label the ASN "PENS-NET-AS" under the Navy Network Information Center, but ARIN's own record carries no Navy-specific name — that label is unverified and should not be presented as fact.

Public abuse signal

None found as of 2026-07-17 — AS664 is absent from Spamhaus ASN-DROP and shows a 0.00% spam rate / 0 flagged IPs in CleanTalk's monthly AS snapshot; treat as an absence-of-signal finding, not a certification.

Community discussion

No AS664-specific NANOG or Reddit operator threads found; the low visibility is consistent with a DoD network's operational-security posture rather than an indicator of anything unusual.

RPKI posture

Unknown — RIPEstat's rpki-validation lookup requires a specific prefix argument and was not evaluated in this pass, so ROA coverage for the announced prefixes is unconfirmed.

Network exposure

Small, stable announced footprint (2 IPv4 + 1 IPv6 prefix) behind a single observed BGP neighbor limits the attack surface visible from public routing data alone.

Operator

United States Department of Defense (DoD), administered via DISA / DoD Network Information Center (DoD NIC), DISA-Columbus [Confirmed] — https://rdap.arin.net/registry/autnum/664

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/664

Allocated

1990-04-19 (ARIN RDAP top-level registration event for containing block DNIC-ASBLK-00616-00665); last changed 2025-09-12 [Confirmed] — https://rdap.arin.net/registry/autnum/664

Org status

Active [Confirmed] — https://rdap.arin.net/registry/autnum/664

Website

Unknown — no live dedicated official site for this ASN/block; historical nic.mil is defunct/archived-only; DISA's general site has no ASN-specific page [Confirmed absence] — https://www.disa.mil/network-services/

Contacts

NOC/abuse — disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil, +1-844-347-2457 ext2 (DISA-Columbus, 300 North James Road, Whitehall, OH 43213); administrative — disa.columbus.ns.mbx.arin-registrations@mail.mil [Confirmed] — https://rdap.arin.net/registry/autnum/664

Security/abuse context (neutral, dated)

no notable public abuse signal as of 2026-07-17 — not in Spamhaus ASN-DROP, 0.00% spam / 0 flagged IPs in CleanTalk's monthly snapshot, no NANOG/Reddit discussion found

Network & routing

Network type

government/military; classified as a stub AS with a single upstream [Confirmed] — https://ipinfo.io/AS664

Size

currently routed — 2 IPv4 prefixes / 1,024 addresses (199.211.166.0/23, 199.211.168.0/23) and 1 IPv6 /48 (2608:167:15::/48); first seen under this origin 2009-09-23, still announced 2026-07-18 [Confirmed] — https://stat.ripe.net/data/routing-status/data.json?resource=664

Routing/peering

1 observed BGP neighbor (identity unresolved), no PeeringDB net record; RIS visibility 324/325 v4 peers, 320/320 v6 peers [Confirmed] — https://stat.ripe.net/data/routing-status/data.json?resource=664, https://www.peeringdb.com/api/net?asn=664

RPKI

Unknown — RIPEstat rpki-validation requires a specific prefix and was not queried in this pass [Unknown]

Notable usage

small DoD-administered footprint; third-party label "PENS-NET-AS" (Navy Network Information Center) appears on bgp.he.net/cidr-report.org but is NOT confirmed by ARIN or any primary DoD/Navy source [Likely, third-party only] — https://bgp.he.net/AS664, https://www.cidr-report.org/as6447/autnums.html

Analyst note

Actively routed DoD block ASN inside DNIC-ASBLK-00616-00665; allocated_date correctly sourced from the RDAP autnum top-level registration event (1990-04-19), not the entity-level decoy dates (1993, 2007, 2009) belonging to individual contact/registration objects on the same record.