AS652

AS652 is a legacy autonomous system number held within a large contiguous ARIN block, DNIC-ASBLK-00616-00665, spanning AS616 through AS665. There is no individually-delegated RDAP record for AS652 itself — ARIN's registry returns the covering block record when queried, registrant handle USDDD, "United States Department of Defense (DoD)." The block's top-level RDAP autnum object carries a registration event dated 1990-04-19 and a last-changed event dated 2025-09-12; those are first-party registry facts and are recorded here as the allocated/last-changed dates for AS652, consistent with how block-delegated DoD ASNs are represented in ARIN RDAP. Administrative and technical operation runs through the DoD Network Information Center, administered by DISA-Columbus (Defense Information Systems Agency), with published NOC/abuse and registrations mailboxes at mail.mil. Every routing data source checked — RIPEstat, CAIDA ASRank, bgp.he.net, and bgp.tools — agrees that AS652 is currently unrouted: zero announced IPv4 or IPv6 prefixes, zero observed BGP peers or upstreams, and zero RIS peer visibility out of several hundred monitored peers. CAIDA assigns it AS rank 79,459 with a singleton customer cone. No notable public abuse signal, NANOG mention, or community discussion was found for AS652 as of 2026-07-17; this reads as an expected consequence of the ASN carrying no live traffic rather than as an affirmative clean bill of health, since AbuseIPDB's dedicated page could not be fetched (HTTP 403) this session.

Country / RIR

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

Allocated / last changed

block top-level RDAP registration event 1990-04-19; last changed 2025-09-12 [Confirmed] — https://rdap.arin.net/registry/autnum/652 (ARIN autnum top-level events, distinct from nested entity dates such as the 1993 and 2009 contact-registration events, which were excluded per instruction)

Operator / administration

DoD Network Information Center, administered by DISA-Columbus (Defense Information Systems Agency); NOC/abuse contact disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil (handle MIL-HSTMST-ARIN); registrations contact disa.columbus.ns.mbx.arin-registrations@mail.mil (handle REGIS10-ARIN)

[Confirmed] — https://rdap.arin.net/registry/autnum/652

Org status

active per ARIN RDAP (block status: active) [Confirmed] — https://rdap.arin.net/registry/autnum/652

Website

no dedicated public page for AS652 or its block; disa.mil could not be verified live this session (placeholder content on /about, connection-refused on root) [Unknown]

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-17 on Spamhaus DROP/ASN-DROP, Cisco Talos, or general web search; AbuseIPDB's AS652 page returned HTTP 403 and is unverified rather than confirmed clean; no NANOG archive mentions found

Network & routing

Network type

government/military ASN block, not a commercial ISP, hosting provider, or content network [Likely] — https://rdap.arin.net/registry/autnum/652

Routing status

not announced — 0 IPv4 and 0 IPv6 prefixes; 0/326 RIS v4 peers and 0/321 RIS v6 peers seeing it; 0 observed neighbours [Confirmed] — RIPEstat routing-status / as-overview / announced-prefixes for resource 652

Peering / upstreams

none observed — CAIDA AS degree total 0 (customer 0, peer 0, provider 0); bgp.he.net and bgp.tools both show 0 announced prefixes and no upstream/peer relationships, with bgp.tools explicitly noting the ASN is "not currently in the global routing table"

[Confirmed, cross-corroborated] — CAIDA ASRank, https://bgp.he.net/AS652, https://bgp.tools/as/652

CAIDA AS rank

79,459; customer cone = singleton (1 ASN, 0 prefixes, 0 addresses) [Confirmed] — CAIDA ASRank (embedded canonical JSON)

RPKI

not assessable — RIPEstat rpki-validation was skipped (requires a prefix, none supplied) and AS652 announces zero prefixes, so no ROAs exist to validate [Confirmed as N/A] — RIPEstat rpki-validation for resource 652

ASN / block

AS652, part of DNIC-ASBLK-00616-00665 (AS616–AS665); no AS652-specific RDAP delegation exists — ARIN returns the covering block [Confirmed] — https://rdap.arin.net/registry/autnum/652

Registrant

United States Department of Defense (DoD), org handle USDDD, 3990 E. Broad Street, Columbus, OH 43218, US [Confirmed] — https://rdap.arin.net/registry/autnum/652

Analyst note

dormant/unannounced legacy ASN within a large DoD-held contiguous ARIN block, consistent with DoD practice of reserving unrouted internal ASN space; live routing infrastructure, if any, would run under a different, actively-announced DoD ASN, none of which was identified in this cycle.