AS678

AS678 (DNIC-AS-00678) is a dormant legacy autonomous system registered under ARIN to the United States Department of Defense (DoD) that currently announces zero IPv4 and zero IPv6 prefixes in the global routing table. The registry record is active, but live BGP data from RIPEstat, CAIDA AS Rank, and Hurricane Electric's BGP Toolkit all agree the ASN has no announced address space, no peers, and no upstreams as of 2026-07-18.

The ASN's ARIN autnum record carries a top-level registration date of 1990-06-05, placing it within IANA's original 1-1876 16-bit AS number block delegated to ARIN. It is administered by the DoD Network Information Center (DNIC) via DISA (Defense Information Systems Agency), with registrant address 3990 E. Broad Street, Columbus, OH, and contact entities based at DISA-Columbus in Whitehall, OH.

AS678 sits alongside other low-numbered DNIC-registered ASNs such as AS367 and AS668, suggesting a block of legacy numbers assigned to DoD early in the Internet's history rather than one named operational network. No source ties AS678 to a specific DoD network segment such as NIPRNet, and no public operator website or PeeringDB entry exists for it — that link stays Unknown.

Country / RIR

US, ARIN [Confirmed] — RIPEstat abuse-contact-finder (authoritative_rir: arin)

Allocated

1990-06-05 (ARIN RDAP autnum TOP-LEVEL registration event); last changed 2025-09-12 [Confirmed] — rdap.arin.net/registry/autnum/678

Website

none current / Unknown — no live AS678-specific operator page found; historical nic.mil only reachable via a 2008 web-archive snapshot [Confirmed absence] — webarchive.library.unt.edu/eot2008/20080916004157/http:/nic.mil/

Abuse contact

disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-18 across Spamhaus DROP/ASN-DROP, abuse.ch, and NANOG archives

Network & routing

Network type

government/military ASN, part of the DoD Information Network (DODIN) under DISN/DISA [Likely] — esd.whs.mil/Portals/54/Documents/DD/issuances/dodi/801001p.pdf

Routing status

dormant — 0 IPv4 and 0 IPv6 announced prefixes; 0 RIS peers seeing it (0/325 v4, 0/321 v6); customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — stat.ripe.net/AS678, bgp.he.net/AS678, api.asrank.caida.org/v2/restful/asns/678

Peering/upstreams

none observed; no PeeringDB entry (peeringdb.com/asn/678 returns 404) [Confirmed] — peeringdb.com/asn/678, db-ip.com/as678-dod-network-information-center

RPKI

not assessable — no announced prefixes, so RIPEstat's rpki-validation (requires a prefix) was skipped rather than run [Unknown] — stat.ripe.net

CAIDA AS rank

79459; degree total 0 (customer 0, peer 0, provider 0) [Confirmed] — api.asrank.caida.org/v2/restful/asns/678

ASN

AS678 (DNIC-AS-00678) [Confirmed] — rdap.arin.net/registry/autnum/678

Registrant / operating entity

United States Department of Defense (DoD); administered by the DoD Network Information Center (DNIC) via DISA; registrant address 3990 E. Broad Street, Columbus, OH; contact entities at DISA-Columbus, 300 North James Road, Whitehall, OH 43213 [Confirmed] — rdap.arin.net/registry/autnum/678

Related legacy block

sibling DNIC-registered low-numbered ASNs include AS367 and AS668, consistent with a block assigned to DoD in the early Internet era rather than one named network; no confirmed link to a specific segment like NIPRNet [Likely] — iana.org/assignments/as-numbers/as-numbers.xhtml, bgpview.io/asn/668

Disambiguation

not to be confused with AS8003 (GRS-DoD), the separate DoD ASN behind the April 2021 ~175-178M dark-IPv4 BGP announcement [Confirmed] — theregister.com/2021/04/26/defense_department_ipv6