AS315

AS315 is a legacy autonomous system number registered under ARIN to the United States Department of Defense (DoD) and administered by the Defense Information Systems Agency (DISA) through the DoD Network Information Center (NIC). It does not carry an individual RDAP record: querying ARIN's RDAP service for autnum 315 returns the parent block record DNIC-ASBLK-00306-00371 (ARIN handle AS306), which spans AS306 through AS371 and was registered on 1989-06-30. The key triage point for AS315 is that it is effectively dormant today. RIPEstat reports the ASN as not announced — zero IPv4 and zero IPv6 prefixes, zero observed neighbours, and 0 of roughly 323 RIS peers seeing any origination. The only prefix ever historically attributed to AS315 in BGP, 155.152.202.0/24, was visible for a brief window in 2010 (first seen 2010-04-06, last seen 2010-12-17) and has not appeared since. CAIDA AS Rank could not be retrieved (the API returned HTTP 502), and RPKI posture is not assessable because nothing is announced. No notable public abuse signal was found as of 2026-06-28 across Spamhaus, AbuseIPDB, ThreatFox/abuse.ch, NANOG archives, or general threat-intelligence searches — consistent with a clean, dormant, government-held ASN. The sole abuse contact on record is DISA-Columbus hostmaster.

Operator

United States Department of Defense (DoD); administered by DISA (Defense Information Systems Agency) via the DoD NIC; registrant ARIN handle USDDD [Confirmed] — https://rdap.arin.net/registry/autnum/315, https://ipinfo.io/AS315

Country / RIR

US, ARIN [Confirmed] — https://stat.ripe.net/data/abuse-contact-finder/data.json?resource=315 (authoritative_rir: arin)

Allocated

1989-06-30 (ARIN RDAP autnum top-level registration event for block DNIC-ASBLK-00306-00371, which covers AS315 — a first-party RIR registry fact, NOT an IEEE date); last changed 2025-09-12 [Confirmed] — https://rdap.arin.net/registry/autnum/315

Org status

U.S. federal government agency. DoD is the registrant (handle USDDD); DISA, a DoD combat support agency, administers the DoD NIC and this ASN block [Confirmed] — https://en.wikipedia.org/wiki/Defense_Information_Systems_Agency, https://rdap.arin.net/registry/autnum/315

Contacts

abuse/hostmaster disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil (handle MIL-HSTMST-ARIN, roles NOC/technical/abuse); +1-844-347-2457 ext 2; DISA-Columbus, 300 North James Road, Whitehall, OH 43213, US

[Confirmed] — https://rdap.arin.net/registry/autnum/315, https://stat.ripe.net/data/abuse-contact-finder/data.json?resource=315

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-28 — not in Spamhaus, AbuseIPDB, ThreatFox/abuse.ch, NANOG archives, or general threat-intel searches; dormant ASN with no live IP space [Likely — Spamhaus/AbuseIPDB returned HTTP 403 gating pages rather than machine-readable "not listed", but no source contradicts] — https://bgp.he.net/AS315, https://bgp.tools/as/315

Network & routing

Network type

U.S. federal government / military network (DoD); AS315 is part of the DoD-reserved block AS306–AS371 and is currently inactive [Confirmed] — https://rdap.arin.net/registry/autnum/315, https://ipinfo.io/AS315

Size

dormant — 0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes currently announced [Confirmed] — https://stat.ripe.net/data/routing-status/data.json?resource=315, https://stat.ripe.net/data/as-overview/data.json?resource=315

Routing/peering

NOT announced — 0 RIS peers seeing it (0/323 v4, 0/321 v6), 0 observed neighbours; only ever-observed prefix 155.152.202.0/24, seen in BGP April–December 2010, none since [Confirmed]. No PeeringDB record (peeringdb.com/asn/315 → 404), no peering policy published

[Confirmed] — https://stat.ripe.net/data/routing-status/data.json?resource=315, https://www.peeringdb.com/asn/315

RPKI

not assessable — AS315 announces no prefixes, so there are no ROAs to validate; RIPEstat RPKI validation skipped (no prefix supplied / none announced) [Unknown] — https://stat.ripe.net/data/rpki-validation/data.json?resource=315

AS rank

Unknown — CAIDA AS Rank API returned HTTP 502 [Unknown]

Notable usage

AS315 belongs to the DoD ASN block DNIC-ASBLK-00306-00371 (AS306–AS371) registered to the Department of Defense in 1989. The DoD NIC, operated under DISA, manages IP address space and ASN assignments for DoD mission partners; AS315 is currently inactive with no BGP routing activity

[Confirmed] — https://rdap.arin.net/registry/autnum/315, https://ipinfo.io/AS315

Related ASNs

part of the contiguous DoD NIC block AS306–AS371 (block handle AS306, name DNIC-ASBLK-00306-00371) [Confirmed] — https://rdap.arin.net/registry/autnum/315

Analyst note

AS315 has no individual RDAP record — ARIN returns the block record (handle AS306, covering AS306–AS371). Entity-level events (org registration 2007-01-12, contact registrations 1993-05-26 and 2009-06-24) are decoy dates; the authoritative allocated_date is 1989-06-30 from the autnum top-level events[]. Clean, dormant DoD ASN.