AS348

AS348 is a legacy autonomous system number registered under ARIN to the United States Department of Defense (DoD), with network operations administered by the Defense Information Systems Agency (DISA) out of Columbus, Ohio. It is not a standalone registration: ARIN holds the entire range AS306–AS371 as a single block record named DNIC-ASBLK-00306-00371, and a query for any individual ASN in that range — including AS348 — returns the block-level autnum object. The registrant org handle is USDDD ("United States Department of Defense (DoD)"). AS348 is a stub network: when announced, it originates the IPv4 aggregate 55.22.0.0/16 (with several /24 more-specifics inside that same /16) plus the IPv6 prefix 2608:14a:2700::/40, and its only adjacency is to AS306, another DoD-operated ASN in the same DNIC block. As of 2026-06-28 it is not announcing routes — RIPEstat reports announced: false, and the most recent prefix timelines all ended 2026-06-26, indicating a recent withdrawal rather than long-term dormancy. No public abuse signal was found: AS348 is absent from the Spamhaus ASN-DROP feed, has no NANOG threads, and surfaces only in consumer-forum confusion about DoD-registered IPs appearing in routine network diagnostics. Two routing-hygiene observations exist (no RPKI ROA coverage and a bgp.he.net bogon flag on the legacy 55.0.0.0/8 space), but both reflect the characteristics of old DoD address space rather than malicious activity.

Operator

United States Department of Defense (DoD); network operations administered by DISA (Defense Information Systems Agency), DISA-Columbus [Confirmed] — ARIN RDAP autnum/348 (registrant org USDDD), https://ipinfo.io/AS348

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP autnum/348; RIPEstat abuse-contact-finder (authoritative_rir: arin)

Allocated

1989-06-30 (ARIN registry date — the autnum top-level registration event for the DNIC-ASBLK-00306-00371 block; NOT an IEEE date, IEEE publishes no ASN dates); last changed 2025-09-12 [Confirmed] — ARIN RDAP autnum/348 top-level events

Org status

active U.S. federal cabinet-level department (DoD); network infrastructure managed by DISA, a DoD combat-support agency [Confirmed] — https://en.wikipedia.org/wiki/Defense_Information_Systems_Agency

Contacts

abuse/NOC disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil; admin disa.columbus.ns.mbx.arin-registrations@mail.mil; DISA-Columbus, 300 North James Road, Whitehall, OH 43213; org address 3990 E. Broad Street, Columbus, OH 43218 [Confirmed] — ARIN RDAP autnum/348 vCards; RIPEstat abuse-contact-finder

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal as of 2026-06-28 — absent from Spamhaus ASN-DROP, no NANOG thread, no indexed AbuseIPDB/threat-feed entries; a bgp.he.net bogon flag on legacy 55.0.0.0/8 reflects old DoD space, not malice [Confirmed for ASN-DROP absence; Likely for bogon/RPKI] — https://www.spamhaus.org/drop/asndrop.json, https://bgp.he.net/AS348

Network & routing

Network type

government/military stub AS — single-homed, sole adjacency is AS306 (also DoD); no external transit, no public downstreams [Confirmed] — https://bgp.tools/as/348, https://ipinfo.io/AS348

Size

when announced, one IPv4 /16 (55.22.0.0/16, ~65,536 addresses) with /24 more-specifics that are sub-prefixes of that same /16, plus one IPv6 /40 (2608:14a:2700::/40) [Confirmed] — RIPEstat announced-prefixes (resource=348)

Routing status

NOT currently announced — announced: false as of 2026-06-28; most recent prefix timelines ended 2026-06-26 (recent withdrawal) [Confirmed] — RIPEstat as-overview + announced-prefixes (resource=348)

Upstreams / peers / AS rank / customer cone

Unknown — AS348 is withdrawn from BGP, so RIPEstat returns no live upstream, peer, rank, or cone data; DoD ASNs typically connect via the DISA-managed DISN backbone [Unknown] — no live source while unannounced

RPKI

no valid ROAs detected for AS348 prefixes; a routing-hygiene gap common to older DoD space, not an abuse signal [Likely] — https://bgp.he.net/AS348

Related ASNs

AS306 (sole adjacency; also DoD, same DNIC block) and the full AS306–AS371 DNIC block [Confirmed] — ARIN RDAP autnum/348; https://bgp.tools/as/348

Block name

DNIC-ASBLK-00306-00371 (covers AS306–AS371; AS348 is one ASN within this DoD block) [Confirmed] — ARIN RDAP autnum/348 (name field; startAutnum 306, endAutnum 371)

Analyst note

Encountered as a DoD stub ASN within a block-level ARIN record (any AS306–AS371 query returns the same block object). Currently withdrawn from BGP; clean reputation. The 2021 DoD BGP activity that drew public attention involved AS8003/AS749, not AS348.