AS258

AS258 is one of the oldest registered autonomous system numbers, allocated under ARIN on 1988-12-23 to Headquarters, USAISC — the United States Army Information Systems Command, the Army command established in 1984 at Fort Huachuca, Arizona to centralize Army-wide information management, automation, and communications systems. The ASN name BRAGGSRI-EGP-AS preserves its EGP-era origin, when Exterior Gateway Protocol predated BGP; the "BRAGGSRI" string is generally read as a Fort Bragg / SRI-era network reference, though that gloss is not registry-confirmed. USAISC as an operational command was inactivated in 1996, with functions passing into the Army's signal/network lineage that today runs as NETCOM (Network Enterprise Technology Command); the ASN registration nonetheless remains active under the historical Headquarters USAISC org handle HEADQU-3, with DISA Columbus listed as the current ARIN registration contact (RDAP last changed 2025-03-13). Operationally the AS is a small U.S. Department of Defense / Army stub: it originates exactly two IPv4 /24 prefixes — 139.241.4.0/24 and 139.242.5.0/24, 512 addresses total — announces no IPv6, has a single upstream provider (AS27064, the DoD Network Information Center), and carries no peers or downstream customers. Despite its tiny footprint it enjoys near-complete global visibility (326 of 327 RIPE RIS v4 peers), consistent with DoD space that upstreams are required to propagate. CAIDA ranks it 54,406 with a singleton customer cone. No notable public abuse signal was found as of June 2026 across Scamalytics, CleanTalk, Spamhaus, NANOG archives, or general threat feeds; a bgp.he.net UI bogon flag did not match the corresponding HE bogon report and is assessed a stale data artifact.

Operator

Headquarters, USAISC — United States Army Information Systems Command (ARIN org handle HEADQU-3; registrant address Fort Huachuca, AZ 85613) [Confirmed] — ARIN RDAP autnum/258, ipinfo.io/AS258

Country / RIR

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

Allocated

1988-12-23 (ARIN registry date from the autnum top-level registration event — a first-party RIR fact, NOT an IEEE date); autnum last changed 2011-11-01 [Confirmed] — ARIN RDAP autnum top-level events

AS name

BRAGGSRI-EGP-AS [Confirmed] — ARIN RDAP autnum/258

Org status

U.S. Federal Government / Military (DoD — U.S. Army); USAISC operational command inactivated 1996, ARIN registration remains active under HEADQU-3 with DISA Columbus as contact (RDAP last changed 2025-03-13) [Confirmed] — ARIN RDAP, en.wikipedia.org/wiki/Army_Network_Enterprise_Technology_Command

Contacts

abuse/registration disa.columbus.ns.mbx.arin-registrations@mail.mil; +1-844-347-2457 ext.2 (DISA-Columbus, 300 North James Road, Whitehall, OH 43213) [Confirmed] — ARIN RDAP, RIPEstat abuse-contact-finder

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal as of 2026-06-20 — Scamalytics 0/100 fraud for the USAISC ISP entity, CleanTalk 0% spam on sibling networks, no Spamhaus/NANOG/threat-feed listing; a bgp.he.net bogon-flag did not match the HE bogon report and is assessed a stale artifact

Network & routing

Network type

U.S. DoD / U.S. Army government military stub AS; single upstream (AS27064 DoD NIC), no peers, no downstream customers; IPv4-only [Confirmed] — bgp.he.net/AS258, ipinfo.io/AS258, RIPEstat routing-status

Size

2 IPv4 /24 prefixes (139.241.4.0/24, 139.242.5.0/24) = 512 addresses; 0 IPv6 prefixes; CAIDA customer cone = 1 ASN, 2 prefixes, 512 addresses [Confirmed] — RIPEstat announced-prefixes / routing-status, CAIDA AS Rank

Routing/visibility

announced and globally visible — 326/327 RIS v4 peers (99.7%), 0/324 v6; CAIDA degree total 1 (provider 1, peer 0, customer 0); first seen 2003-06-25, last seen 2026-06-21 [Confirmed] — RIPEstat routing-status, CAIDA AS Rank

Upstream

AS27064 — DoD Network Information Center [Confirmed] — bgp.he.net/AS258, ipinfo.io/AS258

RPKI

Unknown — RIPEstat rpki-validation skipped (no prefix supplied to the batch fetcher); per-prefix ROA state not evaluated [Unknown] — no source

Peering policy

none active — no PeeringDB record (HTTP 404); a DoD/Army stub with one upstream and no downstreams does not run public peering [Confirmed] — peeringdb.com/asn/258, bgp.he.net/AS258

Notable usage

legacy EGP-era Army ASN registered to Headquarters USAISC (est. 1984, Fort Huachuca; command inactivated 1996; successor lineage NETCOM, est. 2002); the AS is still active with 2 live /24s under DISA Columbus administrative control

[Likely] — ARIN RDAP, en.wikipedia.org/wiki/Army_Network_Enterprise_Technology_Command, ipinfo.io/AS258

Geo footprint

United States; CAIDA centroid lat 39.97 / lon -83.01 (Columbus, OH area); registrant org Fort Huachuca, AZ; DISA tech/abuse contact 300 North James Road, Whitehall, OH 43213 [Confirmed] — ARIN RDAP, CAIDA AS Rank

Analyst note

encountered as a legacy DoD/Army stub ASN — registration tied to a 1996-inactivated command but live and globally routed today under a single DoD upstream. Clean public reputation. RPKI not assessed in this batch run.