AS747

AS747 is an active, currently-announced autonomous system registered under ARIN to Headquarters, USAISC (US Army Information Systems Command) — a legacy "DNIC" (Defense Network Information Center) block that identifies it as U.S. military/Department of Defense network infrastructure rather than a commercial ISP.

The ASN originates 47 distinct IPv4 prefixes per RIPEstat's routing-status feed as of 2026-07-27 (142,336 addresses), plus one IPv6 prefix, 2608:c109:c0::/48. Third-party BGP viewers (bgp.he.net, bgp.tools) report up to 62 IPv4 prefixes depending on vantage point — RIPEstat's 47 sits at the bottom of that range and is treated as the primary, authoritative count, with the higher third-party figures read as vantage-point spread rather than a genuinely larger footprint.

AS747 has no PeeringDB record (confirmed 404 on both the web page and API), consistent with a closed government network that does not participate in public peering. The only relationships visible in third-party BGP data are with two other DoD-registered ASNs: AS27066 (upstream/peer) and AS5277 (peer), both attributed to the United States Department of Defense — matching RIPEstat's observed_neighbours count of 2.

CAIDA AS Rank places AS747 at 12,945 (seen, clique member) with a singleton customer cone — 1 ASN (itself), 45 prefixes, 141,824 addresses — and an AS degree of 2 (1 provider + 1 peer), reported separately from the cone. RPKI validation status could not be established this session — it does not appear in the supplied RIPEstat data or in the single bgp.he.net/bgp.tools fetches available, so it is recorded as Unknown rather than estimated. Geographically the registration points to Fort Huachuca, Arizona (registrant HEADQU-3) with administrative registration handled by DISA-Columbus, Ohio.

The ARIN RDAP autnum record gives a first-party allocation (registration) date of 1990-09-25, with the record last changed 2011-08-02. This is distinct from two nested entity-level dates in the same RDAP response — the registrant org's own record-creation date (1990-03-26) and a point-of-contact's registration date (2009-06-24) — neither of which is the ASN's allocation date.

Operator

Headquarters, USAISC (US Army Information Systems Command); ARIN org handle HEADQU-3, address NETC-ANC CONUS TNOSC, Fort Huachuca, AZ 85613, US [Confirmed] — ARIN RDAP autnum/org record

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP

Allocated

1990-09-25 (ARIN RDAP top-level autnum registration event, first-party RIR fact); last changed 2011-08-02 [Confirmed] — ARIN RDAP autnum top-level events

Org status

active; registrant is a U.S. federal/military entity (Army command, Headquarters USAISC), with technical/admin/abuse contact at DISA-Columbus, indicating DISA manages the ARIN registration on behalf of the Army organization [Confirmed] — ARIN RDAP, ARIN whois

Contacts

disa.columbus.ns.mbx.arin-registrations@mail.mil; +1-844-347-2457 ext. 2; registrant address NETC-ANC CONUS TNOSC, Fort Huachuca, AZ 85613; admin/tech POC address DISA-Columbus, 300 North James Road, Whitehall, OH 43213 [Confirmed for RIR contacts; Likely for phone/address detail] — ARIN RDAP, RIPEstat abuse-contact-finder

Security/abuse context (NEUTRAL, DATED)

not listed in Spamhaus ASN-DROP or flagged on ipinfo.io as of 2026-07-27; bgp.he.net shows a routing-hygiene "announces bogons" flag, not independently corroborated; NANOG archives and broader threat-intel unchecked this session (tooling budget exhausted)

Network & routing

Network type

U.S. military/DoD network infrastructure (Army); not a commercial ISP — inferred from registrant identity and legacy DNIC naming, not an operator self-description [Likely] — ARIN RDAP

Size

47 IPv4 prefixes announced (RIPEstat routing-status, 2026-07-27; 142,336 addresses) [Confirmed]; third-party viewers show up to 62 IPv4 prefixes depending on vantage point, read as vantage-point spread above RIPEstat's authoritative count [Confirmed] — RIPEstat routing-status, bgp.he.net, bgp.tools; 1 IPv6 prefix, 2608:c109:c0::/48

[Confirmed] — RIPEstat, bgp.he.net, bgp.tools

Routing/peering

no PeeringDB record (404 on page and API) — no public peering policy [Confirmed absence]. Upstream/peer AS27066 (US DoD); peer AS5277 (US DoD), both from third-party BGP data, matching RIPEstat's observed_neighbours: 2 [Likely] — bgp.tools, bgp.he.net. CAIDA AS rank 12,945 (seen, clique member); customer cone is a singleton — 1 ASN, 45 prefixes, 141,824 addresses — with an AS degree of 2 (1 provider + 1 peer) reported separately as the relationship count

[Confirmed] — api.asrank.caida.org/v2/restful/asns/747

RPKI

Unknown — RIPEstat rpki-validation requires a per-prefix query not run this session; bgp.tools shows no RPKI stats for this ASN [Unknown]

Notable usage

legacy DNIC-block ASN operated by U.S. Army/DoD network infrastructure (USAISC); bgp.he.net flags it as announcing bogons as of 2026-07-27 [Likely] — bgp.he.net/AS747

Related ASNs

AS27066 (United States Department of Defense, upstream/peer); AS5277 (United States Department of Defense, peer) [Likely] — bgp.tools, bgp.he.net

Analyst note

Website could not be verified this session — disa.mil and home.army.mil (NETCOM) pages were unreachable (connection refused / 404s) and the WebSearch budget was already exhausted before this task began, so no operator-official site content could be cited; recorded as Unknown rather than guessed. Community/NANOG angle (A5) abstained entirely for the same search-budget reason. Core identity, allocation date, and routing-relationship facts are corroborated across ARIN RDAP, RIPEstat, bgp.he.net, and bgp.tools. IPv4 prefix count corrected from an earlier 31 to RIPEstat's authoritative 47 this cycle; as_rank and customer cone were filled from CAIDA AS Rank rather than left Unknown, since CAIDA is a canonical corroborator that returns values for this ASN.