AS617

AS617 is a legacy autonomous system number registered under ARIN as part of the DNIC-ASBLK-00616-00665 block, a single autnum record spanning AS616 through AS665 that ARIN assigns collectively to the United States Department of Defense (DoD, org handle USDDD). The block's top-level RDAP registration event dates to April 19, 1990, and its most recent "last changed" event is September 12, 2025. Administratively, the block is managed by the Defense Information Systems Agency out of DISA-Columbus (3990 E. Broad Street / 300 North James Road, Columbus/Whitehall, Ohio), with a dedicated abuse and NOC mailbox rather than a public-facing operator site — there is no PeeringDB network record for ASN 617, and the DoD's nic.mil hostmaster domain was unreachable during this check. Every routing source consulted (RIPEstat, CAIDA AS Rank) agrees AS617 is currently unannounced: zero IPv4 and IPv6 prefixes, zero RIS peer visibility, and a customer cone consisting only of itself. No public abuse signal was found as of July 2026, consistent with a dormant, non-commercial government allocation rather than an actively routed network.

Operator

United States Department of Defense (DoD), org handle USDDD; administered by the Defense Information Systems Agency (DISA-Columbus) [Confirmed] — https://rdap.arin.net/registry/autnum/617

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/617 ; https://stat.ripe.net/AS617

Allocated

1990-04-19 (ARIN RDAP top-level registration event for the AS616–665 block, which includes AS617); last changed 2025-09-12 [Confirmed] — https://rdap.arin.net/registry/autnum/617

Org status

ARIN RDAP status "active" for the top-level block record containing AS617 [Confirmed] — https://rdap.arin.net/registry/autnum/617

Website

no dedicated public operator website for AS617; DoD's nic.mil hostmaster domain did not resolve during this check; parent agency site (disa.mil) publishes no ASN/peering-specific page [Likely] — https://www.disa.mil

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-17 across Spamhaus ASN-DROP, GreyNoise, AbuseIPDB, and NANOG archives specifically naming AS617; this is an absence finding, not a clean-bill guarantee, given the ASN's limited public routing visibility

Network & routing

Network type

government/military administrative network block (non-commercial); no PeeringDB network record found for ASN 617 [Likely] — https://www.peeringdb.com/api/net?asn=617

Size / routing

NOT currently announced — 0 IPv4 and 0 IPv6 prefixes; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — https://stat.ripe.net/AS617#tabId=routing ; https://asrank.caida.org/asns/617

Routing/peering

0 of 327 RIS peers see any v4 announcement, 0 of 322 see any v6; CAIDA asnDegree all zero (customer 0, peer 0, provider 0); no upstreams, peers, or IXP presence observed; cliqueMember/seen both false [Confirmed] — https://stat.ripe.net/AS617#tabId=routing-status ; https://asrank.caida.org/asns/617

Peering policy

none publicly published; DISA's general DISN Connection Process Guide describes DoD component connection/sponsorship procedures, not an open peering policy for this ASN [Unknown] — https://www.disa.mil/network-services/~/media/files/disa/services/disn-connect/references/disn_cpg.pdf

RPKI

not assessable — AS617 announces no prefixes, so there is no route to validate against a ROA [Unknown] — https://stat.ripe.net/AS617

CAIDA AS rank

79459; asnName "DNIC-ASBLK-00616-00665", source ARIN [Confirmed] — https://asrank.caida.org/asns/617

Geo footprint

CAIDA reports latitude/longitude 0,0, a placeholder and not a real coordinate; registrant/contact addresses place the org in Columbus/Whitehall, Ohio, US [Confirmed] — https://rdap.arin.net/registry/autnum/617

Notable usage

AS617 itself is dormant (0 announced prefixes, 0 peers per ipinfo.io, data last updated 2023-09-12); it sits within the same DoD DNIC allocation family as other DISA-managed ASNs discussed on NANOG (e.g. AS749, "DoD Network Information Center") [Likely] — https://ipinfo.io/AS617 ; https://community.nanog.org/t/squat-space-is-now-being-advertised-by-as-749-dod-network-information-center/54395

Related ASNs

part of ARIN block AS616–AS665 (DNIC-ASBLK-00616-00665); a related DoD DNIC ASN, AS665, is separately corroborated by third-party whois as the same registrant and 1990-04-19 registration date [Likely] — https://whois.ipip.net/AS665

Registered as

single ARIN autnum record handle "AS616", name "DNIC-ASBLK-00616-00665", startAutnum 616 / endAutnum 665 — AS617's allocation date is inherited from this block-level registration, not a per-ASN record [Confirmed] — https://rdap.arin.net/registry/autnum/617

Analyst note

Encountered as one member of a large DoD-administered ARIN block (AS616–665) rather than an individually-allocated ASN; the block's own registration date is used as allocated_date per RIR convention for DNIC blocks. AS617 is currently dormant/unannounced across all routing sources checked.