AS772

AS772 (DNIC-AS-00772) is a dormant legacy Department of Defense autonomous system registered under ARIN to "Headquarters, USAISC" — the U.S. Army Information Systems Command — and today it announces zero IPv4 and zero IPv6 prefixes in the public routing table, with zero visible peers, upstreams, or customers.

The ASN was allocated 1990-11-09 per ARIN RDAP's top-level autnum registration event, with a last-changed date of 2011-08-02. USAISC was deactivated in 1996 and its mission absorbed by the Army's Network Enterprise Technology Command (NETCOM), but the ARIN registration record has not been updated to reflect that reorganization, leaving the operator's current legal name ambiguous.

AS772 was not always dark. Route-collector history shows it originating 143.68.0.0/16 through roughly the 143.78.0.0/16-range block between 2000 and 2003; that announcement history has since gone dark to public route collectors, consistent with a DoD network that may route internally or via non-public paths rather than the commercial Internet's default-free zone. CAIDA ranks it 79,459 globally with a customer cone limited to itself (1 ASN, 0 prefixes, 0 addresses) and zero observed customer, peer, or provider relationships.

No PeeringDB entry, public peering policy, or dedicated operator website was found for AS772, consistent with a non-commercial military-registry ASN rather than one that participates in public interconnection. Day-to-day registry contact routes through the DoD Network Information Center via DISA-Columbus (Whitehall, OH), not through the Fort Huachuca registrant address itself. RPKI cannot be assessed because there are no currently announced prefixes to validate against ROAs.

Operator

Headquarters, USAISC — U.S. Army Information Systems Command (ARIN registrant; command deactivated 1996, mission absorbed by NETCOM but registry record unchanged) [Confirmed for registrant name; Unknown for current legal-name currency] — ARIN RDAP autnum/entity HEADQU-3, en.wikipedia.org/wiki/Army_Network_Enterprise_Technology_Command

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP autnum 772

Allocated

1990-11-09 (ARIN RDAP top-level autnum registration event); last changed 2011-08-02 [Confirmed] — rdap.arin.net/registry/autnum/772

Org status

ASN status active per ARIN; registrant org HEADQU-3 is associated with other legacy DNIC ASNs (e.g. AS13, AS588, AS1490), consistent with a shared DoD block registrant rather than a single dedicated operator [Confirmed for ASN status; Likely for the related-ASN cluster] — ARIN RDAP entity HEADQU-3

Contacts

abuse/admin/tech via disa.columbus.ns.mbx.arin-registrations@mail.mil, DoD Network Information Center, DISA-Columbus, 300 North James Road, Whitehall, OH 43213 [Confirmed]; registrant address Headquarters, USAISC, Fort Huachuca, AZ 85613 [Confirmed] — ARIN RDAP autnum 772

Security/abuse context (NEUTRAL, DATED, PARTIAL)

no notable public abuse signal found as of 2026-07-31, but Spamhaus ASN-DROP's JSON migration and an AbuseIPDB block (HTTP 403/404) left the check inconclusive rather than confirmed-clean; no NANOG or BGP-hijack-incident mentions found

Network & routing

Network type

government/military (U.S. Army / DoD); legacy DNIC ASN block, currently unannounced [Likely] — ARIN RDAP

Size

dormant — 0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes today; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — RIPEstat as-overview/announced-prefixes, CAIDA AS Rank (2026-07)

Routing/peering

NOT announced — 0/328 v4 and 0/322 v6 RIS peers see it; CAIDA asnDegree 0 customer / 0 peer / 0 provider [Confirmed]. Historically originated 143.68.0.0/16 through ~143.78.0.0/16-range space, first seen 2000, last seen 2003, since gone dark to route collectors [Confirmed] — RIPEstat, CAIDA ASRank

RPKI

not assessable — AS772 announces no prefixes today, so there are no ROAs to validate against [Confirmed absence of announced routes; Unknown for historical RPKI] — RIPEstat

Notable usage

legacy DoD/DNIC ASN; day-to-day registry contact routes through the DoD Network Information Center via DISA-Columbus rather than the Fort Huachuca registrant address [Confirmed] — ARIN RDAP

Related ASNs

AS13, AS588, AS1490 (other legacy DNIC ASNs sharing the HEADQU-3 registrant org) [Likely] — ARIN RDAP entity HEADQU-3

Analyst note

Dormant/legacy DoD ASN. The ARIN record still names USAISC, a command deactivated in 1996 and absorbed into NETCOM, with no apparent rename in the registry. Zero current announcements across all routing sources consulted; the historical 2000–2003 announcement of 143.68.0.0/16-range space has since gone dark, and the abuse-signal check is only partially conclusive due to two source-access limitations (Spamhaus JSON migration, AbuseIPDB 403/404).