AS508

AS508 is a legacy autonomous system number held by ARIN as the top end of a block registration spanning AS379–AS508 (RDAP handle AS379, block name AFCONC-BLOCK1-AS), registered to Air Force Systems Networking — a U.S. Department of Defense / U.S. Air Force networking organization administratively handled by DISA-Columbus. The block's top-level RDAP registration event dates to 1989-08-04, with a last-changed event of 2008-06-06; entity-level dates nested under the registrant org (7ESG, registration 2008-06-05) and the administrative contact (REGIS10-ARIN, registration 2009-06-24) are unrelated metadata timestamps, not the block's allocation date. AS508 is currently unrouted: RIPEstat's as-overview reports announced:false, the announced-prefixes query returned zero IPv4 and IPv6 prefixes for the 2026-06-26–2026-07-10 window, and routing-status shows 0 of 327 IPv4 RIS peers and 0 of 321 IPv6 RIS peers observing it. CAIDA corroborates with seen:false, an AS rank of 79,459, a customer cone limited to the ASN itself (0 prefixes, 0 addresses), and all-zero asnDegree (no customers, peers, or providers). No PeeringDB entry exists for AS508, and no operator website, published peering policy, or public incident/abuse-feed mention was found — consistent with an inactive, non-publicly-facing military ASN. No notable abuse signal was located across Spamhaus, NANOG archives, or SecLists as of 2026-07-10.

Operator

Air Force Systems Networking (U.S. DoD / U.S. Air Force; administratively handled by DISA-Columbus) [Confirmed] — https://rdap.arin.net/registry/autnum/508

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/508

Allocated

1989-08-04 (ARIN RDAP top-level autnum "registration" event for block AS379–AS508); last changed 2008-06-06 [Confirmed] — https://rdap.arin.net/registry/autnum/508

Org status

active per ARIN registry status; no indication of retirement or transfer [Likely] — https://rdap.arin.net/registry/autnum/508

Contacts

administrative/technical/abuse via REGIS10-ARIN — disa.columbus.ns.mbx.arin-registrations@mail.mil, +1-844-347-2457 ext2; DISA-Columbus, 300 North James Road, Whitehall, OH 43213 [Confirmed] — https://rdap.arin.net/registry/autnum/508

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-10 — not in Spamhaus resource hub, NANOG archives, or SecLists; plausibly explained by AS508 being unrouted

Network & routing

Network type

U.S. federal government / military (Department of Defense, U.S. Air Force, administered by DISA) [Likely] — https://rdap.arin.net/registry/autnum/508

Size

dormant — 0 IPv4/IPv6 prefixes announced; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — https://stat.ripe.net/data/announced-prefixes/data.json?resource=508, https://asrank.caida.org/asns/508

Routing/peering

NOT announced — 0/327 v4 and 0/321 v6 RIS peers seeing it; CAIDA asnDegree all zero (no upstreams, peers, customers); no PeeringDB entry (404 for asn=508) [Confirmed] — https://stat.ripe.net/data/routing-status/data.json?resource=508, https://www.peeringdb.com/api/net?asn=508

RPKI

not assessable — AS508 announces no prefixes, so there are no ROAs to validate; RIPEstat rpki-validation was skipped (requires a supplied prefix) [Unknown, sourced null] — https://stat.ripe.net/AS508

Notable usage

Unknown for this specific ASN; it is the upper bound of a 130-ASN block (AS379–AS508, AFCONC-BLOCK1-AS) allocated as a unit to Air Force Systems Networking in 1989. No official source describes a distinct operational role for AS508 individually [Likely] — https://rdap.arin.net/registry/autnum/508

Related ASNs

part of block registration AS379–AS508 (RDAP handle AS379, name AFCONC-BLOCK1-AS) [Confirmed] — https://rdap.arin.net/registry/autnum/508

Analyst note

Legacy DoD/Air Force ASN, the upper bound of block AS379–AS508. Currently unrouted across every source consulted (RIPEstat, CAIDA); no PeeringDB entry, operator website, or published peering policy — typical for a dormant military-held ASN with no commercial routing presence.