AS285

AS285 is a legacy, very-low-numbered autonomous system number registered under ARIN to Headquarters, USAISC — the U.S. Army Information Systems Command, a Department of Defense entity whose registry record traces to Fort Huachuca, Arizona. As one of the sub-300 ASNs, it dates to the earliest years of public Internet routing: the ARIN RDAP autnum top-level registration event is 1989-05-11, with the record last changed 2011-08-24. The triage point for AS285 is that it is effectively dormant in routing today. Every routing source consulted (RIPEstat as-overview and routing-status, CAIDA AS Rank) agrees it announces zero IPv4 and zero IPv6 prefixes, is not seen by any RIS peer (0/325 v4, 0/323 v6), has zero observed neighbours, and a CAIDA degree of zero across customer/peer/provider. Its CAIDA AS rank of 79,459 sits near the bottom of the global ranking, and its customer cone is a singleton (the ASN itself, 0 prefixes, 0 addresses). The registrant organization (USAISC) was disestablished in September 1996 and reconstituted as U.S. Army Signal Command, but the allocation remains active on ARIN's records, with administrative and abuse contact now handled by DISA-Columbus (Defense Information Systems Agency, Whitehall OH; disa.columbus.ns.mbx.arin-registrations@mail.mil). No notable public abuse signal was found as of June 2026 — Scamalytics rates the holder 0/100 fraud risk, and AS285 is absent from Spamhaus ASN-DROP, with no documented BGP hijack or route-leak incidents, NANOG abuse discussion, or malware/botnet association in reachable public feeds — consistent with a closed, non-commercial government network.

Operator

Headquarters, USAISC (U.S. Army Information Systems Command, a DoD entity; ARIN org handle HEADQU-3, Fort Huachuca, AZ) [Confirmed] — ARIN RDAP, whois.arin.net/rest/asn/AS285

Country / RIR

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

Allocated

1989-05-11 (ARIN registry date from the autnum top-level registration event, NOT an IEEE date — IEEE publishes no ASN registration dates); last changed 2011-08-24 [Confirmed] — ARIN RDAP autnum top-level events

Org status

registrant USAISC was disestablished September 1996 and reconstituted as U.S. Army Signal Command; the ASN allocation itself remains active in ARIN records (last RDAP-observed update 2011-08-24). Record contact is now DISA-Columbus (Defense Information Systems Agency, Whitehall OH)

[Confirmed] — ARIN RDAP, en.wikipedia.org/wiki/Army_Network_Enterprise_Technology_Command

Contacts

abuse/admin disa.columbus.ns.mbx.arin-registrations@mail.mil; phone +1-844-347-2457 ext 2; admin location 300 North James Road, Whitehall, OH 43213; legacy registrant location NETC-ANC CONUS TNOSC, Fort Huachuca, AZ 85613 [Confirmed] — ARIN RDAP

Website

Unknown — no public-facing operator website found for AS285 specifically; USAISC was disestablished in 1996 and its successor commands are distinct entities [Unknown] — army.mil/usaisec

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-25 — Scamalytics rates the holder 0/100 fraud risk; absent from Spamhaus ASN-DROP; no documented BGP hijack/route-leak in public archives; no NANOG abuse discussion; no malware/botnet/C2 association in reachable public feeds [Likely — negative findings via web-search surface coverage, not direct DNSBL/API queries] — scamalytics.com/ip/isp/headquarters-usaisc, spamhaus.org/blocklists/do-not-route-or-peer, bgpview.io/asn/285

Network & routing

Network type

U.S. federal government / U.S. military (Department of Defense) — legacy ASN allocated to an Army command; third-party tools classify it generically as "ISP/Business/Hosting" but the actual operator is a DoD entity [Confirmed] — ARIN RDAP, ipinfo.io/AS285

Size

dormant — 0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — RIPEstat routing-status / as-overview / CAIDA AS Rank (2026-06)

Routing/peering

NOT announced — RIPEstat as-overview announced:false; 0 RIS peers seeing it (0/325 v4, 0/323 v6); 0 observed neighbours; CAIDA degree total 0 (customer 0, peer 0, provider 0); no upstreams or peers visible in any source [Confirmed]. No public peering policy document found; not present in PeeringDB

[Unknown for policy] — bgp.he.net/AS285, bgp.tools/as/285, RIPEstat routing-status

RPKI

not assessable — AS285 announces no prefixes, so there are no ROAs to validate [Unknown] — RIPEstat (rpki-validation requires a prefix; none announced)

Notable usage

AS285 is a historically significant very-low-numbered ASN (sub-300 range) from the earliest years of public Internet routing, assigned to the U.S. Army's central information systems command. The command was disestablished in 1996; the ASN appears retained by DoD/DISA as an administrative record but carries no current traffic [Confirmed for registry facts; Likely for the retention rationale] — ARIN RDAP, en.wikipedia.org/wiki/Army_Network_Enterprise_Technology_Command

IANA ASN block

1-1876, "Assigned by ARIN," IANA 16-bit Autonomous System (AS) Numbers Registry [Confirmed] — RIPEstat as-overview

Analyst note

Encountered as a dormant legacy military ASN. WHOIS resolves to Headquarters, USAISC, but there is no live routing under AS285 — zero announcements, zero peers, zero cone across all sources. Clean, inactive ASN held on the DoD/DISA record.