AS13

AS13 is a legacy U.S. government allocation registered under ARIN to Headquarters, USAISC (U.S. Army Information Systems Command) at Fort Huachuca, AZ, in the DNIC (Defense Network Information Center) series — not Xerox PARC, which is a common folklore misattribution. In RFC 1020 (1987) the AS13 entry was historically "BRL-AS" (Army Ballistic Research Laboratory); it now sits under U.S. Army Information Systems Command, so this is firmly a government/military allocation. It actively announces about six IPv4 prefixes plus one IPv6 prefix (including 128.63.0.0/16 and ranges in 192.5.24.0/23, 192.12.65.0/24, 192.33.13.0/24, and 204.235.72.0/21), with its single upstream being AS668 (the DoD Network Information Center / DREN — Defense Research and Engineering Network) and one peer. For triage, treat AS13 as U.S. military/DoD infrastructure routed through DREN — not a university, and emphatically not Xerox. The ARIN ASN RegDate of 1984-07-16 is the registry date; the original assignment predates it. No notable public abuse signal was found as of June 2026.

Operator

Headquarters, USAISC (U.S. Army Information Systems Command; ARIN OrgId HEADQU-3, Fort Huachuca, AZ) [Confirmed] — ARIN RDAP

Country / RIR

US, ARIN [Confirmed]

Allocated

ARIN ASN RegDate 1984-07-16 (registry date; original predates it; org Updated 2025-03-13); DoD registration via DISA [Confirmed for shown date]

Org status

active

Security/abuse context (NEUTRAL, DATED)

government network; no notable public abuse signal found as of 2026-06-07 — bgp.tools

Network & routing

Network type

government / military [Confirmed]

Size

6 IPv4 prefixes (some DBs list 7), 1 IPv6 (~68,864 IPv4 addrs); incl. 128.63.0.0/16 — bgp.he.net / bgp.tools / bigdatacloud.com (2026-06)

Routing/peering

single upstream AS668 (DoD NIC / DREN), 1 peer; actively announcing — bgpview.io

Notable usage

U.S. Army/DoD network handle in the DNIC series; RFC 1020 (1987) historically labeled AS13 "BRL-AS" (Army Ballistic Research Laboratory); now under U.S. Army Information Systems Command. NOT Xerox PARC — ipip.net

Related ASNs

large family of DNIC-AS / "Headquarters, USAISC" ASNs (e.g., AS172, AS1480-range block) and DoD AS668 (DREN) [Confirmed]

Analyst note

Treat AS13 as U.S. military/DoD infrastructure routed through DREN (AS668) — not a university, and emphatically not Xerox PARC.