AS722

AS722 is an active autonomous system operated by the DoD Network Information Center (DNIC) on behalf of the United States Department of Defense, registered under ARIN's legacy DNIC-ASBLK-00721-00726 block and managed operationally by the Defense Information Systems Agency's DISA-Columbus facility. It is currently routed — RIPEstat records seven announced IPv4 prefixes and zero IPv6 — rather than a dormant or squatted allocation.

The block traces to the pre-ARIN Defense Data Network (DDN) NIC regime. ARIN's RDAP record for the block shows only a "last changed" event dated 2025-09-12 at the autnum top level, with no registration event present. A separate source cites 2007-01-12 as a registration date for the same block record, but that figure could not be corroborated against the top-level events array and is treated as unverified rather than adopted.

Routing data across sources is not fully consistent: RIPEstat shows seven announced IPv4 prefixes (roughly 8,700 addresses via /24-equivalent aggregation), while third-party lookups (bgp.tools, ipapi.is, db-ip.com) report as many as 14 prefixes and ~18,900 addresses for the same ASN. The sole visible upstream and peer in BGP data is AS27064 (DISA / DoD Network Information Center).

AS722 sits alongside other DNIC-block ASNs (including AS721 and AS749) used by DoD components; AS749 drew NANOG attention in 2021 for suddenly announcing previously dormant DoD address space. That episode, and the more widely reported 2021 case of AS8003 (Global Resource Systems LLC) advertising large dormant DoD /8 blocks, are distinct incidents involving different ASNs and should not be attributed to AS722.

Operator

United States Department of Defense (DoD), via the DoD Network Information Center (DNIC); managed by DISA-Columbus (300 North James Road, Whitehall, OH 43213) [Confirmed] — https://rdap.arin.net/registry/autnum/722

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/722

Allocated

Unknown — the autnum's RDAP top-level events[] carries only a "last changed" event (2025-09-12), no registration event; a third-party citation of 2007-01-12 for the same block record could not be corroborated and is not adopted [Confirmed for the absence of a top-level registration event; Unknown for the true allocation date] — https://rdap.arin.net/registry/autnum/722

Org status

Active [Confirmed] — https://rdap.arin.net/registry/autnum/722

Contacts

disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil (abuse); registrant address 3990 E. Broad Street, Columbus, OH 43218 (USDDD); DISA-Columbus, 300 North James Road, Whitehall, OH 43213 [Confirmed] — https://rdap.arin.net/registry/autnum/722

Security/abuse context (NEUTRAL, DATED)

no AS722-specific abuse, botnet, spam, or hijack reporting found as of 2026-07-25 across Spamhaus, GreyNoise, and NANOG archives — an absence-of-reporting result, not a direct reputation-API clearance

Network & routing

Network type

US federal government/military network; part of the Defense Information System Network (DISN), DoD's enterprise telecom infrastructure managed by DISA; not a commercial ISP/transit/content network [Confirmed] — https://dl.dod.cyber.mil/wp-content/uploads/connect/pdf/unclass-DISN_CPG.pdf, https://en.wikipedia.org/wiki/Defense_Information_System_Network

Size

7 announced IPv4 prefixes / ~8,704 addresses per RIPEstat and bgp.tools/bgp.he.net /24-equivalent aggregation; 0 IPv6 prefixes; third-party sources (ipapi.is, db-ip.com, whoer.com) report up to 14 IPv4 prefixes / ~18,900 addresses for the same ASN

[Likely — sources disagree] — https://bgp.tools/as/722, https://bgp.he.net/AS722, https://ipapi.is/asn/722.html

Routing/peering

sole visible upstream and peer is AS27064 (DISA / DoD Network Information Center), corroborated by CAIDA AS-degree data (asnDegree total 1: customer 0, peer 0, provider 1; cliqueMember true, seen true), consistent with a customer cone of 1 ASN / 7 prefixes / 8,704 addresses; no PeeringDB net record exists for AS722 (API lookup 404); no public peering policy published [Confirmed for the AS27064 relationship via CAIDA corroboration; Confirmed-negative for the PeeringDB absence] — https://bgp.he.net/AS722, https://bgp.tools/as/722, https://www.peeringdb.com/api/net?asn=722, https://api.asrank.caida.org/v2/restful/asns/722

RPKI

not directly validated; bgp.he.net shows 0 RPKI-valid and 0 RPKI-invalid origins for AS722, suggesting no confirmed ROA coverage [Likely] — https://bgp.he.net/AS722

Notable usage

part of the legacy DNIC-ASBLK-00721-00726 block (AS721–AS726 per RDAP startAutnum 721 / endAutnum 726); AS749 is a separate DoD/DNIC-space ASN, not a member of this block, that drew NANOG attention in 2021 for announcing previously dormant DoD address space — a distinct incident from the unrelated, more widely reported AS8003 (Global Resource Systems) 2021 dormant-DoD-/8 story, which should not be attributed to AS722 [Confirmed] — https://community.nanog.org/t/squat-space-is-now-being-advertised-by-as-749-dod-network-information-center/54395, https://www.theregister.com/2021/04/26/defense_department_ipv6/, https://rdap.arin.net/registry/autnum/722

Related ASNs

AS27064 (upstream/peer, DISA/DNIC); AS721, AS749 (same DNIC block family) [Likely] — https://bgp.he.net/AS722, https://community.nanog.org/t/squat-space-is-now-being-advertised-by-as-749-dod-network-information-center/54395

Analyst note

No dedicated operator website or about-page exists for AS722; the parent agency's public site is disa.mil but has no ASN-specific page. Prefix-count and allocation-date figures disagree across sources and are recorded as ranges/unknowns rather than reconciled by guesswork.