AS308

AS308 is a legacy autonomous system number registered under ARIN to the United States Department of Defense (DoD), administered by the Defense Information Systems Agency (DISA) through its DoD Network Information Center (DNIC). It is one slot within the DNIC-ASBLK-00306-00371 block (AS306–AS371), a contiguous range of 66 ASNs assigned to the DoD. The triage point for AS308 is that it is dormant: every routing source consulted (RIPEstat routing-status, bgp.he.net, bgp.tools, BGPView) agrees it currently announces zero IPv4 and zero IPv6 prefixes, has zero visible BGP peers, and is seen by 0 of 323 IPv4 RIS peers and 0 of 321 IPv6 RIS peers. It was visible historically — first seen in BGP on 2009-07-30 (214.27.8.0/24) and last seen on 2023-03-03 (214.38.179.0/24) — originating only a small number of /24 prefixes inside the DoD's legacy 214.0.0.0/8 space, with a single observed peer AS1913 (also DoD). RPKI posture cannot be assessed because there are no active originations and therefore no ROAs to validate. The ARIN RDAP autnum top-level registration event dates the allocation to 1989-06-30, with the record last changed 2025-09-12. No notable public abuse signal was found as of 2026-06-28 — not on Spamhaus ASN-DROP, UCEPROTECT, or in NANOG archives; a lone CleanTalk "100% spam rate" entry is a statistical artifact of a single-IP dataset and carries no operational weight.

Operator

United States Department of Defense (DoD), administered by DISA / DoD Network Information Center (DNIC) (ARIN handle USDDD; holder DNIC-ASBLK-00306-00371) [Confirmed] — ARIN RDAP autnum, ipinfo.io/AS308

Country / RIR

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

Allocated

1989-06-30 (ARIN autnum top-level registration event; an RIR registry fact, NOT an IEEE date); last changed 2025-09-12 [Confirmed] — ARIN RDAP autnum top-level events

Org status

U.S. federal government combat-support agency (DoD/DISA); RIR status active (validated); registrant block handle USDDD, registered address 3990 E. Broad Street, Columbus, OH 43218 [Confirmed] — rdap.arin.net/registry/autnum/308

Contacts

disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil; +1-844-347-2457 (DISA Columbus NOC/abuse) [Confirmed via RIPEstat abuse-contact-finder; Likely for phone via RDAP]

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-28 — not on Spamhaus ASN-DROP, UCEPROTECT, or in NANOG archives; AbuseIPDB has no AS-level page (404). A CleanTalk "100% spam rate" entry derives from a single IP and is not operationally significant given BGP inactivity since 2023

Network & routing

Network type

U.S. federal government / military; AS308 is a legacy/inactive slot in the DoD's DNIC-ASBLK-00306-00371 block [Confirmed] — rdap.arin.net/registry/autnum/308, bgp.tools/as/308

Size

dormant — 0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes currently announced; historically originated two /24s (214.27.8.0/24, 214.38.179.0/24, 256 IPs each) — RIPEstat routing-status / bgp.he.net (2026-06)

Routing/peering

NOT announced — 0 RIS peers seeing it (0/323 v4, 0/321 v6); not in the global table since 2023-03-03; first seen 2009-07-30 [Confirmed]. No peering policy documented for AS308 itself (never persistently routed) [Confirmed]

RPKI

not assessable — AS308 announces no prefixes, so there are no ROAs to validate; bgp.he.net shows no valid or invalid RPKI-originated prefixes [Confirmed]

Notable usage

one of 66 ASNs in the DoD's DNIC-ASBLK-00306-00371 block (AS306–AS371); a reserved/dormant slot within the DoD's historic ASN allocation. The broader DNIC operation also runs G.root-servers.net (one of the 13 Internet root nameservers) [Confirmed for block membership; Likely for the G-root association via third-party context] — rdap.arin.net/registry/autnum/308, ipinfo.io/AS308

Related ASNs

AS306–AS371 (the full DNIC-ASBLK-00306-00371 DoD block); AS1913 (DoD; sole historically observed peer of AS308) [Confirmed] — rdap.arin.net/registry/autnum/308, bgp.he.net/AS308

Analyst note

Encountered as a dormant legacy ASN within the DoD's historic DNIC block; WHOIS/RDAP resolves to the DoD, but the ASN is not currently routed. Clean, inactive ASN. Historical /24 originations inside legacy 214.0.0.0/8 (US-DOD) space were treated as bogons by some filters; these predate the 2023 withdrawal.