AS316

AS316 is a legacy autonomous system number registered under ARIN to the United States Department of Defense (DoD), administered on the DoD's behalf by the Defense Information Systems Agency (DISA) out of DISA-Columbus, 300 North James Road, Whitehall, OH. It is not an independently registered per-ASN record: ARIN returns the block object DNIC-ASBLK-00306-00371, which covers the contiguous range AS306–AS371, and AS316 sits inside that block. The registrant org is the U.S. Department of Defense (ARIN OrgID USDDD). In BGP databases the network is named "DoD Network Information Center," while the announced address space — dominated by the 55.8.0.0/16 sub-block of the historical DoD 55.0.0.0/8 — is attributed to "Headquarters, USAISC" (the former US Army Information Systems Command, Fort Huachuca, AZ). This is a closed government/military routing domain: it offers no open peering, has no PeeringDB entry, and its only observed BGP neighbours are other DoD autonomous systems. As of the late-June 2026 observation window the ASN was not currently announced — RIPEstat reported announced: false and zero live prefixes — though it had recently announced ten IPv4 prefixes (about 65,792 addresses, dominated by 55.8.0.0/16) and one IPv6 prefix (2608:14a:1600::/40) between 2026-06-14 and 2026-06-26. No notable public abuse signal was found (Spamhaus, CleanTalk, AbuseIPDB, NANOG archives all clean), consistent with a largely dark, reserved government block. bgp.he.net flags it as announcing bogons, which is a routing-hygiene artifact of legacy DoD space that predates RPKI, not an abuse indicator.

Operator / registrant

United States Department of Defense (DoD); ARIN OrgID USDDD; administered by DISA-Columbus (Defense Information Systems Agency) [Confirmed] — ARIN RDAP autnum/316 (A1, A2, A3)

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP autnum/316; RIPEstat abuse-contact-finder (authoritative_rir: arin) (A1, A3)

Allocated

1989-06-30 — ARIN autnum top-level registration event for the DNIC-ASBLK-00306-00371 block (the authoritative first-party RIR date for this ASN range; NOT an IEEE date); last changed 2025-09-12 [Confirmed] — ARIN RDAP autnum/316 top-level events (A1, A2, A3)

ASN block

DNIC-ASBLK-00306-00371 (AS306–AS371, the contiguous DoD/DISA block; ARIN returns the block record when querying AS316) [Confirmed] — ARIN RDAP autnum/316 (A1, A2, A3)

Contacts

NOC/technical/abuse disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil (+1-844-347-2457 ext 2); registrations disa.columbus.ns.mbx.arin-registrations@mail.mil; DISA-Columbus, 300 North James Road, Whitehall, OH 43213 [Confirmed] — ARIN RDAP autnum/316 vCard (A1, A3)

Website

no AS316-specific public site; DISA operates https://www.disa.mil/ [Likely] — disa.mil, ARIN RDAP (A2)

Security / abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-28 — no Spamhaus listing (per-ASN check returned 403, no secondary listing found), CleanTalk shows 0 blacklisted / 0% spam, AbuseIPDB has no AS-level page (404), no NANOG threads name AS316; bgp.he.net "announces bogons" flag is a routing-hygiene artifact, not an abuse listing

Network & routing

Network type

U.S. federal government / military internal routing domain; stub/government AS, not a commercial ISP, transit provider, or CDN; bgp.tools tags "Content," ipinfo.io uses the generic "ISP/Business/Hosting" bucket [Confirmed] — bgp.tools/as/316, bgp.he.net/AS316, ipinfo.io/AS316 (A2, A3)

Routing status

NOT currently announced as of 2026-06-28 (announced: false; 0 live v4/v6 prefixes); recently announced 10 IPv4 + 1 IPv6 prefixes in the 2026-06-14→2026-06-26 window; visible to ~325/326 RIS peers (v4) and 323/323 (v6) when announced

[Confirmed] — RIPEstat as-overview / routing-status / announced-prefixes for AS316 (A1, A3)

Size

~65,792 IPv4 addresses (55.8.0.0/16 = 65,536; 139.241.53.0/24 = 256; the other /24 and /22 are more-specifics within 55.8.0.0/16) and one /40 IPv6 prefix [Confirmed] — RIPEstat announced-prefixes (A3)

Peering

no open/public peering; bgp.tools notes a "Global Aggregation Policy"; only 2 observed BGP neighbours, both DoD ASNs (AS306, AS27066); no PeeringDB entry (404) [Confirmed] — bgp.tools/as/316, bgp.he.net/AS316, RIPEstat routing-status (A2, A3)

RPKI

Unknown — RPKI validation was skipped (no prefix supplied to the endpoint); bgp.he.net shows 0 RPKI-valid / 0 RPKI-invalid origins; legacy DoD space commonly un-ROA'd [Unknown for ROA posture; Confirmed that he.net reports zero valid/invalid] — bgp.he.net/AS316 (A3, A4)

Notable usage

legacy DoD/DISA block; primary address tenant is the 55.8.0.0/16 sub-block of the historical DoD 55.0.0.0/8 space attributed to "Headquarters, USAISC" (Fort Huachuca, AZ); 0 hosted domains and 0 ICMP-responsive IPs per ipinfo.io (Sept 2025), consistent with a largely dark/reserved block

[Confirmed] — ipinfo.io/AS316, bgp.he.net/AS316 (A2, A4)

Related ASNs

AS306 (block handle), AS27066, and the rest of AS306–AS371 (all DoD/DISA) [Confirmed for block range; Likely for specific observed neighbours] — ARIN RDAP autnum/316, bgp.tools/as/316 (A2, A3)

Announced prefixes (recent)

IPv4 — 55.8.0.0/16 plus deaggregates (55.8.180.0/24, 55.8.181.0/24, 55.8.182.0/24, 55.8.183.0/24, 55.8.185.0/24, 55.8.186.0/24, 55.8.188.0/22, 55.8.252.0/24) and the out-of-block 139.241.53.0/24; IPv6 — 2608:14a:1600::/40 [Confirmed] — RIPEstat announced-prefixes for AS316 (A1, A3)

Analyst note

ARIN returns the block record DNIC-ASBLK-00306-00371 (AS306–AS371) for a query on AS316, not a per-ASN object. The top-level autnum registration date 1989-06-30 is the block's authoritative RIR allocation date and is recorded as allocated_date. The org entity USDDD (registered 2007-01-12) and the contact entities MIL-HSTMST-ARIN (1993-05-26) / REGIS10-ARIN (2009-06-24) carry their own entity-level registration dates that must NOT be substituted for the block date. as_rank, customer_cone, and named upstreams/peers are Unknown from the sources consulted (CAIDA not fetched).