AS213

AS213 is a legacy autonomous system number registered under ARIN to "Headquarters, USAISC" — the U.S. Army Information Systems Command, the registrant name frozen at registration time in 1988. USAISC was inactivated on 1 October 1996, and its functions flowed through U.S. Army Signal Command to the present-day U.S. Army Network Enterprise Technology Command (NETCOM) at Fort Huachuca, Arizona; the ARIN org record (handle HEADQU-3) was never refreshed to the successor command. Operationally AS213 is a tightly controlled U.S. military stub network within the Department of Defense Information Network (DoDIN). It announces exactly one IPv4 prefix (131.92.0.0/17, 32,768 addresses) and one IPv6 prefix (2001:480:1670::/48), and it is single-homed: CAIDA records one provider, zero peers, and zero customers, while bgp.he.net shows the sole upstream as AS668 (U.S. Department of Defense). Despite that minimal topology, the routes are near-universally visible — 326 of 327 IPv4 RIS peers and all 324 IPv6 RIS peers see the announcement. The CAIDA AS rank is 15,094 with a singleton customer cone (itself, 1 prefix, 32,768 addresses), consistent with an edge/stub AS. No public peering policy exists, which is expected for a closed DoD allocation, and no IXP presence was detected. The administrative, technical, and abuse contact is DISA Columbus (REGIS10-ARIN). No notable public abuse signal was found as of 2026-06-19 — AS213 does not appear on Spamhaus, UCEPROTECT, CleanTalk, alphaMountain, or community ASN blocklists, consistent with a non-commercial government network.

Operator

Headquarters, USAISC (U.S. Army Information Systems Command; ARIN handle HEADQU-3). USAISC was inactivated 1 Oct 1996; the live successor operator is NETCOM at Fort Huachuca, AZ [Confirmed] — ARIN RDAP, en.wikipedia.org/wiki/Army_Network_Enterprise_Technology_Command

Country / RIR

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

Allocated

1988-07-11 (ARIN RDAP autnum top-level registration event — first-party RIR fact, NOT an IEEE date); last changed 2011-08-24 [Confirmed] — ARIN RDAP autnum top-level events

Org status

active (ARIN status: active). Registrant org name is defunct (USAISC inactivated 1996); registration was never updated to the successor command NETCOM (stood up 1 Oct 2002). Org handle remains HEADQU-3 [Confirmed] — ARIN RDAP, Wikipedia (NETCOM)

IANA block

ASN 213 falls in IANA 16-bit AS block 1–1876, assigned by ARIN [Confirmed] — RIPEstat as-overview

Contacts

DISA Columbus (REGIS10-ARIN) — disa.columbus.ns.mbx.arin-registrations@mail.mil; +1-844-347-2457 ext 2; 300 North James Road, Whitehall, OH 43213. Registrant address: NETC-ANC CONUS TNOSC, Fort Huachuca, AZ 85613 [Confirmed] — ARIN RDAP, RIPEstat abuse-contact-finder

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-19 — absent from Spamhaus, UCEPROTECT Spammerheavens, CleanTalk, alphaMountain top-risky-ASNs, and community ASN blocklists; NANOG archives show no abuse mentions. A June 2022 MANRS advisory about MikroTik AS-path-prepend errors penalizing single-digit ASNs is a third-party router error, not AS213 activity, and no incident named AS213 [Confirmed for blocklist absence; Likely for MANRS context] — uceprotect.net, cleantalk.org/blacklists/asn, alphamountain.ai, manrs.org

Network & routing

Network type

U.S. federal government / military stub AS within the DoDIN; single-homed to AS668 (U.S. DoD) [Confirmed] — ARIN RDAP, bgp.he.net/AS213, ipinfo.io/AS213

Size

1 IPv4 prefix (131.92.0.0/17, 32,768 addresses) and 1 IPv6 prefix (2001:480:1670::/48); customer cone = singleton (1 ASN itself, 1 prefix, 32,768 addresses) [Confirmed] — RIPEstat routing-status / announced-prefixes, CAIDA AS Rank

Routing/peering

announced and near-universally visible — 326/327 IPv4 RIS peers, 324/324 IPv6 RIS peers; CAIDA degree total 1 (1 provider, 0 peers, 0 customers); observed neighbours 1; sole upstream AS668 (U.S. DoD) per bgp.he.net [Confirmed]. No public peering policy [Confirmed — none published]

RPKI

not assessable from canonical data — RIPEstat RPKI validator was not run with a prefix in this query, so ROA status for 131.92.0.0/17 is unconfirmed [Unknown]

Notable usage

U.S. Army headquarters networking operated via NETC-ANC CONUS TNOSC (Theater Network Operations and Security Center), Fort Huachuca, AZ — a command-and-control network operations role [Confirmed] — ARIN RDAP, bgp.he.net/AS213

Analyst note

Encountered as a very old (1988) low-traffic U.S. Army military stub AS. The autnum registration date (1988-07-11) is the correct allocated_date; entity-level dates (HEADQU-3 registration 1990-03-26, REGIS10-ARIN 2009-06-24) are org/contact record decoys, correctly excluded. A5 community angle abstained (no web access) — no refutation, other angles retained.