AS725

AS725 is a dormant autonomous system number registered under ARIN to the United States Department of Defense (DoD), as part of the DNIC-ASBLK-00721-00726 block (AS721–AS726) operationally administered by the Defense Information Systems Agency (DISA). It currently announces zero IPv4 and zero IPv6 prefixes across every routing source checked.

ARIN RDAP returns a flat block record — handle AS721, name DNIC-ASBLK-00721-00726 — rather than a per-ASN registration event, so AS725's allocated_date cannot be recorded: the top-level autnum object carries only a "last changed" event dated 2025-09-12, with no "registration" eventAction. Entity-level dates on the linked USDDD org (2007-01-12) and POC records (1993-05-26, 2009-06-24) are registrant/contact artifacts, not the ASN's own allocation date, and were excluded rather than substituted.

RIPEstat, CAIDA AS Rank, bgp.he.net, and bgp.tools all agree AS725 has zero announced prefixes, zero visible BGP peers, zero upstreams, and a singleton customer cone (itself, 0 prefixes, 0 addresses). Its CAIDA AS rank of 79,459 sits near the bottom of the global ranking. PeeringDB lists an Open peering policy with no locations or contracts required, though this appears unused given the total absence of announcements.

DISA is a DoD combat support agency established in 1991 (successor to the Defense Communications Agency, founded 1960) that operates the DoD Information Network, including DISN backbone transport, NIPRNet, and SIPRNet. AS725 itself is registered but appears reserved or unused rather than actively routed.

Operator

United States Department of Defense (DoD); operationally administered by the Defense Information Systems Agency (DISA) via the DoD Network Information Center (DNIC) [Confirmed] — https://rdap.arin.net/registry/autnum/725

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/725

Allocated

Unknown — the RDAP autnum top-level events[] carries no "registration" eventAction, only "last changed" = 2025-09-12; entity-level org/POC registration dates (2007-01-12, 1993-05-26, 2009-06-24) are registrant/contact artifacts, not the ASN's own allocation date

[Confirmed absence, per RDAP data model] — https://rdap.arin.net/registry/autnum/725

Org status

active — ARIN autnum status "active"; PeeringDB rir_status "ok" (last checked 2024-06-26). DISA established 1991, successor to the Defense Communications Agency (founded 1960) [Confirmed] — https://rdap.arin.net/registry/autnum/725, https://en.wikipedia.org/wiki/Defense_Information_Systems_Agency

Contacts

technical/abuse — disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil (MIL-HSTMST-ARIN, DISA-Columbus, 300 North James Road, Whitehall, OH 43213); administrative — disa.columbus.ns.mbx.arin-registrations@mail.mil (REGIS10-ARIN, same address); registrant org (USDDD) — 3990 E. Broad Street, Columbus, OH 43218

[Confirmed] — https://rdap.arin.net/registry/autnum/725

Website

not declared for AS725 specifically in RDAP or PeeringDB (both blank); the DISA homepage did not render usable content via fetch and does not map 1:1 to this ASN, so it is omitted rather than asserted [Unknown] — https://www.peeringdb.com/api/net?asn=725

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-25 — not in Spamhaus ASN-DROP or NANOG archives; no active BGP announcements (bgp.he.net), consistent with a dormant/reserved DoD-allocated ASN. AbuseIPDB and IPQualityScore were inaccessible and remain unchecked [Confirmed for checked sources; Unknown for AbuseIPDB/IPQualityScore] — https://www.spamhaus.org/drop/asndrop.json, https://bgp.he.net/AS725

Network & routing

Network type

U.S. government/military network, part of the DoD Information Network (DODIN); DISA operates DISN (backbone transport), NIPRNet, and SIPRNet [Confirmed] — https://en.wikipedia.org/wiki/Defense_Information_Systems_Agency, https://help.disa.mil/network-connections/

Size

dormant — 0 IPv4 prefixes / 0 addresses and 0 IPv6 prefixes; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — RIPEstat / CAIDA AS Rank / bgp.he.net / bgp.tools (2026-07-25)

Routing/peering

NOT announced — 0 RIS peers seeing it (0/331 v4, 0/324 v6); CAIDA degree total 0 (customer 0, peer 0, provider 0); no upstreams or peers visible in any source [Confirmed]. PeeringDB lists an Open peering policy (locations/contracts not required, no policy_url published) [Confirmed policy record; Likely relevance given no live announcements] — https://stat.ripe.net, https://www.peeringdb.com/api/net?asn=725

RPKI

not assessable — AS725 announces no prefixes, so there are no ROAs to validate; bgp.he.net shows 0 RPKI records [Confirmed] — https://stat.ripe.net, https://bgp.he.net/AS725

Notable usage

member of the DoD/DISA DNIC-ASBLK-00721-00726 address block; supports DoD networking infrastructure adjacent to DISN/NIPRNet. Traffic volume, prefix counts, and ratio are undisclosed in PeeringDB [Likely] — https://www.peeringdb.com/api/net?asn=725

Related ASNs

AS721, AS722, AS723, AS724, AS726 (fellow members of the DNIC-ASBLK-00721-00726 block) [Confirmed] — https://rdap.arin.net/registry/autnum/725

Registry block

DNIC-ASBLK-00721-00726 (AS725 is one member of this ARIN-registered block spanning AS721–AS726) [Confirmed] — https://rdap.arin.net/registry/autnum/725

Analyst note

encountered as a dormant DoD-allocated ASN inside a flat ARIN block record (AS721–AS726) with no per-ASN registration event; all four routing sources agree on zero announcements, zero peers, zero customer cone. Clean, inactive ASN under DoD/DISA administration.