AS657

AS657 is a dormant autonomous system number registered under ARIN within the DoD Network Information Center block DNIC-ASBLK-00616-00665, a contiguous range spanning AS616 through AS665. The registrant organization on record is the United States Department of Defense (org handle USDDD), with the block administered operationally by the Defense Information Systems Agency out of DISA-Columbus, Whitehall, Ohio. This is not a commercial ISP, hosting provider, or enterprise network — it is a slice of reserved federal address-plan space, and every routing-intelligence source consulted (RIPEstat, CAIDA AS Rank, and a live bgp.he.net check) agrees the ASN currently announces zero IPv4 and zero IPv6 prefixes, carries zero observed BGP peers, and sits in a customer cone of exactly one ASN — itself. CAIDA ranks it 79,459th globally, near the very bottom, consistent with an unrouted block. No PeeringDB entry exists for AS657 (404), and no dedicated public operator website was found; DISA's general site has no page specific to this ASN. No notable public abuse or threat signal was identified as of 2026-07-17. Note for the record: AS657 must not be confused with AS8003 (Global Resource Systems LLC), the unrelated ASN behind the widely reported January 2021 announcement of dormant Pentagon IPv4 space — that reporting does not apply here.

Operator

United States Department of Defense (DoD), org handle USDDD; block administered by DISA (DISA-Columbus, 300 North James Road, Whitehall, OH 43213) [Confirmed] — https://rdap.arin.net/registry/autnum/657

Country / RIR

US, ARIN [Confirmed] — https://stat.ripe.net/AS657 (abuse-contact-finder authoritative_rir: arin)

Allocated

1990-04-19 (ARIN RDAP autnum top-level "registration" event for the DNIC-ASBLK-00616-00665 block covering AS657; block-level, not an IEEE date); last changed 2025-09-12 [Confirmed] — https://rdap.arin.net/registry/autnum/657

Org status

active per ARIN RDAP status field for the AS616–AS665 registration, though administratively dark (no current BGP activity) [Confirmed] — https://rdap.arin.net/registry/autnum/657

Website

Unknown — no dedicated public operator website for AS657 was located; DISA's general site (disa.mil) has no ASN-specific page [Confirmed (absence verified)] — https://rdap.arin.net/registry/autnum/657

Contacts

abuse/NOC/technical — disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil ("Network DoD"); registrations — disa.columbus.ns.mbx.arin-registrations@mail.mil; registrant address 3990 E. Broad Street, Columbus, OH 43218 [Confirmed] — https://rdap.arin.net/registry/autnum/657

Security/abuse context (NEUTRAL, DATED)

no notable public abuse, spam, or botnet signal found as of 2026-07-17 across Spamhaus, general abuse-feed search, NANOG archives, and IPQualityScore's ASN page; consistent with a dormant, unannounced federal block [Likely] — https://www.spamhaus.org/blocklists/spamhaus-blocklist/, https://www.ipqualityscore.com/asn-details/AS657/dod-network-information-center

Network & routing

Network type

U.S. federal government / military (DoD Network Information Center block, AS616–AS665); not a commercial or enterprise operator [Confirmed] — https://rdap.arin.net/registry/autnum/657

Size

dormant — 0 IPv4 prefixes / 0 IPv4 addresses, 0 IPv6 prefixes / 0 IPv6 /48s; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — https://stat.ripe.net/AS657, https://asrank.caida.org/asns/657

Routing/peering

NOT announced — RIPEstat as-overview.announced=false, 0 RIS peers seeing it (0/325 v4, 0/320 v6); CAIDA asnDegree total 0 (customer 0, peer 0, provider 0); bgp.he.net corroborates 0 announced/originated prefixes and 0 observed peers; no PeeringDB entry (404) and no public peering policy located

[Confirmed] — https://stat.ripe.net/AS657, https://bgp.he.net/AS657, https://www.peeringdb.com/asn/657

RPKI

not assessable — zero announced prefixes means no ROA-to-route pair to validate; RIPEstat's rpki-validation endpoint requires a --prefix parameter and was not run [Unknown] — https://stat.ripe.net/AS657

Notable usage

no known public service, CDN, or hosting use; the ASN is inactive DoD address-plan space. Distinct from AS8003 (Global Resource Systems LLC), the ASN behind the January 2021 "dormant Pentagon IP space" BGP announcement — that event does not apply to AS657

[Confirmed] — https://www.kentik.com/blog/the-mystery-of-as8003/

Analyst note

AS657 is one ASN inside the DoD Network Information Center block DNIC-ASBLK-00616-00665 (AS616–AS665), not a standalone commercially operated network. The ARIN RDAP top-level registration date (1990-04-19) applies to the whole block object, since ARIN does not expose a per-ASN date within a DNIC range; it is recorded as allocated_date per the first-party-RIR-date rule. All routing sources agree the ASN is currently unannounced.