AS129

AS129 is a legacy United States Department of Defense autonomous system, registered with ARIN under the name DNIC-AS-00129 and the organization handle USDDD. The registrant of record is the U.S. Department of Defense, and the day-to-day network and ARIN registration contacts resolve to DISA — the Defense Information Systems Agency — at its Columbus, Ohio facility (DISA-Columbus, 300 North James Road, Whitehall, OH 43213). The ARIN RDAP record shows a registry registration date of 1987-09-23, which makes AS129 one of the earliest assigned AS numbers; that date is an ARIN database value and is not attributable to IEEE. In routing terms AS129 behaves as a stub: it announces 16 IPv4 prefixes totaling roughly 7,936 addresses across the 143.140.x, 205.67.x, 205.77.x, and 214.29.x ranges, announces no IPv6, and is observed transiting through a single upstream, AS27064 (the DoD Network Information Center / DISA backbone), with no public-IXP peering and no downstream customers. RPKI coverage is absent — no ROAs are observed for its prefixes. The DoD does not publish a public peering policy for AS129, and no PeeringDB entry exists for it; it is closed government infrastructure rather than a commercial network. No notable public abuse signal was found as of June 2026: Scamalytics scores the DoD Network Information Center ISP 0/100, AS129 is not on the Spamhaus DROP list, and the widely discussed 2021 DoD BGP announcement event involved a different ASN (AS8003), not AS129.

Operator

United States Department of Defense (DoD); managed by DISA (Defense Information Systems Agency), DISA-Columbus, OH [Confirmed] — ARIN RDAP (https://rdap.arin.net/registry/autnum/129)

AS name / handle

DNIC-AS-00129; AS129; registrant org handle USDDD [Confirmed] — ARIN RDAP

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP

Allocated

ARIN RDAP registration 1987-09-23 (registry database date, NOT IEEE-sourced); last changed 2025-09-12 [Confirmed] — ARIN RDAP

Org status

active; US federal combat-support agency (DISA HQ Fort Meade, MD); AS129 registrant address Columbus, OH [Confirmed] — ARIN RDAP, en.wikipedia.org/wiki/Defense_Information_Systems_Agency

Website

no AS129-specific public site; DISA's site is https://www.disa.mil/ [Likely] — disa.mil

Security / abuse context (NEUTRAL, DATED)

no notable public abuse signal as of 2026-06-12; Scamalytics DoD NIC ISP 0/100; not on Spamhaus DROP; the 2021 DoD BGP event was AS8003, a separate ASN [Confirmed] — scamalytics.com (https://scamalytics.com/ip/isp/dod-network-information-center), kentik.com (https://www.kentik.com/blog/the-mystery-of-as8003/)

Network & routing

Network type

US federal government / military stub (leaf) network; legacy DoD IPv4 space [Confirmed] — bgp.tools (https://bgp.tools/as/129)

Size

16 IPv4 prefixes / ~7,936 IPv4 addresses (bgp.he.net 7,936 = bgp.tools 31×/24, consistent); prefix count corroborated single-angle [address total Confirmed; prefix count Likely] — bgp.he.net (https://bgp.he.net/AS129), bgp.tools

Routing / upstream

sole observed upstream/peer AS27064 (DoD NIC / DISA backbone); no public-IXP peering; no customers [Confirmed for AS27064 upstream] — bgp.he.net, bgp.tools

Peering policy

none published; no PeeringDB entry for AS129 [Likely] — peeringdb.com (https://www.peeringdb.com/org/17705)

RPKI

no ROAs / no RPKI coverage observed (all prefixes RPKI-unknown) [Confirmed] — bgp.he.net

AS rank / customer cone

Unknown (no global rank returned; stub with no visible customers) [Unknown]

Related ASNs

AS27064 (DoD NIC / DISA upstream) [Confirmed]; DoD holds 20+ ASNs [Likely] — bgp.tools

IPv6

none announced [Confirmed] — bgp.he.net, bgp.tools

NOC / abuse contact

disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil, +1-844-347-2457 ext2 (ARIN handle MIL-HSTMST-ARIN); registrations disa.columbus.ns.mbx.arin-registrations@mail.mil (REGIS10-ARIN) [Confirmed] — ARIN RDAP

Analyst note

Encountered as legacy DoD/DISA infrastructure; closed military network, single DoD-internal upstream, clean abuse posture. A5 community angle abstained (no findings), not a refutation.