AS360

AS360 is a legacy autonomous system number registered under ARIN to the United States Department of Defense (DoD). It is not a standalone allocation: ARIN's RDAP lookup for autnum 360 resolves to the block-level object DNIC-ASBLK-00306-00371 (handle AS306, startAutnum 306 through endAutnum 371), a flat range of AS numbers reserved for DoD network operations. The block is administratively managed by the DoD Network Information Center (DNIC) and operated by the Defense Information Systems Agency (DISA), whose registration and abuse contacts sit at DISA-Columbus (300 North James Road, Whitehall, OH 43213). The block's registration event dates to 1989-06-30 per ARIN's top-level autnum record — the first-party RIR allocation date recorded here for AS360 as a member of that block. Unlike many legacy DoD ASNs, AS360 is actually announcing routes: RIPEstat routing-status reports roughly 117 IPv4 prefixes (~66,304 addresses) and one IPv6 prefix visible in the global table, first seen in BGP around 2008-09-25. CAIDA ASRank places it at global rank 13742 with a singleton customer cone (1 ASN, ~66,048 addresses) and a single upstream provider relationship (provider=1, customer=0, peer=0), consistent with a stub, single-homed, non-transit network. PeeringDB lists an Open peering policy with no IXP presence, no traffic disclosure, and no route-server participation. On abuse posture, no notable public signal was found as of 2026-07-01: AS360 does not appear in the Spamhaus ASN-DROP list (asndrop.txt dated 2026/07/01), and no NANOG-archive threads or documented BGP hijack/route-leak incidents were attributable to AS360 itself — a clean profile befitting a government/military-operated ASN.

Operator

United States Department of Defense (DoD); allocation block managed by the DoD Network Information Center (DNIC), operated by DISA (Defense Information Systems Agency) [Confirmed] — ARIN RDAP (https://rdap.arin.net/registry/autnum/360), https://www.peeringdb.com/net/15845, https://www.iana.org/whois?q=MIL

Country / RIR

US, ARIN (registrant address Columbus/Whitehall, OH) [Confirmed] — ARIN RDAP (https://rdap.arin.net/registry/autnum/360)

Allocated

1989-06-30 (ARIN registry date, from the autnum TOP-LEVEL events[] registration event for block DNIC-ASBLK-00306-00371; NOT an IEEE date — IEEE publishes no ASN dates); last changed 2025-09-12 [Confirmed] — ARIN RDAP autnum top-level events

Block context

ARIN registers AS360 only as part of the flat block DNIC-ASBLK-00306-00371 (handle AS306, AS306–AS371); there is no distinct per-ASN RDAP object for 360, so the registration/last-changed dates are the block's, applied to AS360 as a member

[Confirmed] — ARIN RDAP (https://rdap.arin.net/registry/autnum/360)

Org status

active — ARIN autnum status "active"; PeeringDB RIR status "ok"; DoD/DISA is an active US federal agency [Confirmed] — ARIN RDAP, https://www.peeringdb.com/net/15845

IANA Reference

blank (no RFC reference applies to this ASN allocation) [Confirmed] — n/a

Contacts

DoD Network Information Center, DISA-Columbus, 300 North James Road, Whitehall, OH 43213; abuse/technical NOC email disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil; registrations disa.columbus.ns.mbx.arin-registrations@mail.mil; tel +1-844-347-2457

[Confirmed] — ARIN RDAP, https://www.iana.org/whois?q=MIL

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-01 — not in Spamhaus ASN-DROP (asndrop.txt 2026/07/01), no NANOG-archive threads, no BGP hijack/route-leak incident attributable to AS360 itself. (A 2013 CyberBunker hijack of a different DoD prefix, 205.19.72.0/23 via AS34109, is unrelated to AS360.)

Network & routing

Network type

US federal government / military network (DoD); not a commercial ISP, content, or enterprise network; stub / single-homed / non-transit [Confirmed] — ARIN RDAP, https://ipinfo.io/AS360, https://bgp.he.net/AS360

Size

~117 IPv4 prefixes / ~66,304 IPv4 addresses and 1 IPv6 prefix announced; customer cone = singleton (1 ASN, 113 prefixes, ~66,048 addresses) [Confirmed] — RIPEstat routing-status (https://stat.ripe.net/AS360), CAIDA ASRank (https://asrank.caida.org/asns/360)

Routing/peering

announced = true; observed_neighbours = 1; CAIDA asnDegree provider=1, customer=0, peer=0 (single upstream, no downstreams); AS rank 13742 (cliqueMember). The specific upstream/peer ASN is not named in the source data [Confirmed for degree/announced; peer identity Unknown] — RIPEstat (https://stat.ripe.net/AS360), CAIDA ASRank (https://asrank.caida.org/asns/360)

Peering policy

PeeringDB lists "Open" — no ratio, contract, or multi-location requirement; no IXP/facility presence; no traffic disclosure; direct peering only (no route servers) [Likely] — https://www.peeringdb.com/net/15845

RPKI

not evaluated — RIPEstat rpki-validation was skipped (requires a per-prefix query); RPKI validity Unknown [Unknown] — RIPEstat source JSON (rpki-validation skipped)

Routing first seen

~2008-09-25 in BGP (prefix 55.58.0.0/16, origin AS360) — a routing-visibility date, distinct from the 1989-06-30 RIR allocation date [Confirmed] — RIPEstat routing-status (https://stat.ripe.net/AS360)

Notable usage

AS360 is one member of the DoD's DNIC-ASBLK-00306-00371 reserved AS block, administered from DISA-Columbus; it actively announces DoD IPv4 space (55.58.x.x range observed). DISA also operates the G-root DNS server among the 13 logical root operators [Confirmed for block/DISA; Likely for G-root operator role] — ARIN RDAP, https://www.peeringdb.com/net/15845, https://en.wikipedia.org/wiki/Defense_Information_Systems_Agency

Analyst note

Encountered as an active DoD stub ASN within the legacy DNIC AS306–AS371 block. WHOIS/RDAP resolves to the block object (handle AS306), not a standalone AS360 record; org identity cross-verified via bgp.he.net and ipinfo.io. Clean abuse profile.