AS552

AS552 is a legacy ARIN-registered autonomous system number allocated on 1989-11-14 to the United States Department of Defense, carrying the registry object name DNIC-AS-00552 — a reference to the Defense Network Information Center, the DoD's historical registry block administered by DISA (Defense Information Systems Agency) out of its Columbus, Ohio facility. The registrant organization handle is USDDD, and the abuse/technical contacts (MIL-HSTMST-ARIN, REGIS10-ARIN) both resolve to the same DISA-Columbus address at 300 North James Road, Whitehall, OH. ARIN RDAP reports the autnum's registration status as active and last changed on 2025-09-12, but the ASN is currently dark in the global routing table: RIPEstat reports zero announced IPv4/IPv6 prefixes, zero of 327 RIS peers seeing it in IPv4 and zero of 322 in IPv6, and zero observed BGP neighbours; CAIDA ASRank independently agrees (seen: false, rank 79459, customer cone limited to itself with zero prefixes and zero addresses). Historically, RIPEstat's routing-status shows AS552 announced 137.95.0.0/16 from 2005-06-24 through a narrower 137.95.152.0/24 last seen 2019-07-09, indicating it stopped being routed roughly mid-2019 even though the ARIN registry record remains administratively active. No PeeringDB record exists for AS552 (404), and no notable public abuse signal was found on Spamhaus ASN-DROP or in NANOG archives as of 2026-07-11, consistent with a dormant, non-abused government-held ASN rather than an actively operated commercial network.

Operator

United States Department of Defense (DoD); RIR object name DNIC-AS-00552, registrant org handle USDDD [Confirmed] — https://rdap.arin.net/registry/autnum/552

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/552, https://stat.ripe.net/AS552

Allocated

1989-11-14 (ARIN RDAP autnum TOP-LEVEL registration event — a first-party RIR fact, not an entity/org contact-record date); last changed 2025-09-12 [Confirmed] — https://rdap.arin.net/registry/autnum/552 (two angles, A2 and A3, independently read the same top-level event and explicitly distinguished it from decoy entity-level dates on MIL-HSTMST-ARIN, REGIS10-ARIN, and org USDDD)

Org status

ARIN RDAP status = active (registry record), but operationally dormant/unrouted in live BGP since ~2019 per RIPEstat and CAIDA agreement [Confirmed] — https://rdap.arin.net/registry/autnum/552, https://stat.ripe.net/AS552

Website

no dedicated operator-published site found for AS552 itself; ipinfo.io lists an associated domain of mail.mil, but this is a third-party database association, not an operator "about us" claim [Unknown] — https://ipinfo.io/AS552

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-11 — not on Spamhaus ASN-DROP, no NANOG archive hits found

Network & routing

Network type

U.S. federal government / military network under the legacy Defense Network Information Center (DNIC) block administered by DISA; not a commercial ISP or content network [Confirmed] — https://rdap.arin.net/registry/autnum/552, https://ipinfo.io/AS552

Size

dormant — 0 IPv4/IPv6 prefixes announced, 0 addresses; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — https://stat.ripe.net/AS552, https://api.asrank.caida.org/v2/restful/asns/552

Routing/peering

NOT currently announced — 0/327 RIS peers see it in v4, 0/322 in v6; CAIDA degree total 0 (customer 0, peer 0, provider 0); no PeeringDB record (404) and no publicly published peering policy [Confirmed] — https://stat.ripe.net/AS552, https://www.peeringdb.com/asn/552

Historical routing

announced 137.95.0.0/16 first seen 2005-06-24, narrowing to 137.95.152.0/24 last seen 2019-07-09 — appears to have gone dark from BGP roughly mid-2019 [Confirmed] — https://stat.ripe.net/AS552

RPKI

not assessable — no prefixes currently announced, so no ROAs exist to validate against [Unknown] — https://stat.ripe.net/AS552

Notable usage

legacy DNIC-block registry object tied to DISA's Columbus, Ohio operations facility, part of the broader Defense Information Systems Network (DISN) infrastructure that DISA operates; no source ties AS552 specifically to a named public-facing DISN service

[Likely] — https://rdap.arin.net/registry/autnum/552, https://help.disa.mil/network-connections/

Related ASNs

none confirmed as directly related; adjacent DoD-held ASNs surfaced in searches (AS668, AS3416, AS5842, AS27065, AS540, AS532) but no source ties them to AS552 specifically [Unknown]

Analyst note

Encountered as a dormant legacy DoD/DISA registry ASN — registry record active, but zero live BGP presence since mid-2019; two independent angles (A2, A3) each correctly read the RDAP autnum top-level registration event rather than a decoy entity-level date.