AS568

AS568 is a U.S. military autonomous system number registered under ARIN's DNIC (Defense Network Information Center) delegation to the United States Department of Defense, with registrant handle USDDD and object name DNIC-AS-00568. The ARIN RDAP autnum's top-level registration event dates the allocation to 1990-01-01, with a most-recent top-level "last changed" event of 2025-09-12; entity-level contact and org-record dates (1993, 2007, 2009) belong to individual contact and organization objects, not the ASN's own registration event, and are excluded here as decoys. Operationally, AS568 is dormant: RIPEstat's as-overview reports it as not currently announced, with zero visible IPv4 or IPv6 prefixes, zero observed BGP neighbours, and zero RIS peer visibility across 327 (v4) and 322 (v6) monitored peers. CAIDA AS Rank places it at #79,459 with a customer cone of exactly one ASN (itself) and no measurable prefix or address footprint, consistent with an inactive registration rather than a live transit or edge network. Routing history recorded by RIPEstat shows the ASN once originated 204.223.128.0/17 (first seen 2000-08-18) and, more recently, 138.161.49.0/24 (last seen 2018-01-22) — no announcements have been observed since. The registrant's administrative and abuse contacts trace to DISA-Columbus facilities in Whitehall and Columbus, Ohio, and the ASN is notably absent from PeeringDB's public DoD organization listing of 21 other DoD-administered ASNs, consistent with DoD military number resources generally not publishing open peering policies. No current public abuse or security signal was found for AS568, though a single, uncorroborated angle surfaced decades-old NANOG/RIPE routing-list chatter about possible bogus routes tied to the surrounding "DISO-UNRRA" address space in 2004 — noted here for completeness but not confirmed against AS568 specifically by any other source.

Operator

United States Department of Defense (DoD); registrant org handle USDDD; DNIC military ASN block administered via DISA/DoD Network Information Center [Confirmed] — https://rdap.arin.net/registry/autnum/568

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/568

Allocated

1990-01-01 (ARIN RDAP autnum TOP-LEVEL registration event); last changed 2025-09-12 [Confirmed] — https://rdap.arin.net/registry/autnum/568 (entity-level dates for MIL-HSTMST-ARIN 1993-05-26, REGIS10-ARIN 2009-06-24, and org USDDD 2007-01-12 are contact/org metadata, not the ASN's own allocation date, and were excluded)

Org status

active (RDAP status); registrant United States Department of Defense (DoD), org handle USDDD [Confirmed] — https://rdap.arin.net/registry/autnum/568

Website

no ASN-specific operator page found; DISA's corporate site (disa.mil/about) returned an unfetchable JS-shell placeholder in this session, so its content could not be independently confirmed [Unknown] — https://www.disa.mil/about

Abuse/NOC contact

disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil, +1-844-347-2457 ext2 (handle MIL-HSTMST-ARIN); admin/tech disa.columbus.ns.mbx.arin-registrations@mail.mil (handle REGIS10-ARIN)

Security/abuse context (dated, neutral)

no notable public abuse signal found as of 2026-07-11; not present on Spamhaus's ASN-DROP list; ipinfo.io shows the ASN as inactive/dormant, which limits abuse telemetry

Network & routing

Network type

DNIC/military ASN registered to the U.S. DoD; no public documentation ties it to a specific named DoD backbone (e.g., NIPRNet/DISN) as distinct from the DoD/DISA generically [Unknown at the AS-specific level] — https://rdap.arin.net/registry/autnum/568

Size / routing status

dormant — RDAP status "active" but RIPEstat as-overview announced=false; 0 IPv4 and 0 IPv6 prefixes currently announced; 0 observed neighbours; 0/327 v4 and 0/322 v6 RIS peers seeing it [Confirmed] — https://stat.ripe.net/AS568#tabId=routing

AS rank / cone

CAIDA AS Rank #79,459; cliqueMember=false; seen=false; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — https://api.asrank.caida.org/v2/restful/asns/568

Routing history

first seen originating 204.223.128.0/17 on 2000-08-18; last seen originating 138.161.49.0/24 on 2018-01-22; no announcements since [Confirmed] — https://stat.ripe.net/AS568#tabId=routing

Peering

no PeeringDB network record; absent from the 21 ASNs listed under the DoD's PeeringDB org page [Confirmed as a negative finding] — https://www.peeringdb.com/org/17705

RPKI

not assessed — rpki-validation requires a specific prefix parameter, which was not supplied; no ROA/ROV posture determinable for a non-announcing AS [Unknown]

Geo footprint

registrant/contact addresses in Whitehall, OH 43213 (DISA-Columbus, NOC/tech/abuse) and Columbus, OH 43218 (org); CAIDA lat/long 0,0 is a placeholder, not a real coordinate [Confirmed for addresses; explicitly not a geolocation fact] — https://rdap.arin.net/registry/autnum/568

Related ASNs

none specifically confirmed in this cycle; not cross-checked against the broader DNIC/DoD ASN family [Unknown]

Historical note (single-source, uncorroborated for AS568 specifically)

2004-era NANOG/RIPE routing-WG CIDR reports flagged possible bogus routes tied to a "DISO-UNRRA" designation in this address space; no other angle corroborates this against AS568 itself, and no 2005–2025 community mentions were found

[Likely, single angle] — https://www.ripe.net/ripe/mail/archives/routing-wg/2004-April/000154.html

Analyst note

dormant DoD/DNIC military ASN with a routing history spanning 2000–2018 but no current announcements; distinct from actively-routed DoD ASNs listed under PeeringDB org 17705.