AS499

AS499 is a legacy ARIN-registered autonomous system number sitting inside a large consecutive government block, AS379–AS508, all registered under the ARIN organization handle 7ESG ("Air Force Systems Networking"). The registrant's vCard address resolves to 501 East Moore Dr., Bldg 884 Rm 1100, Gunther Annex, Maxwell AFB, Alabama — home of the 754th Electronic Systems Group — while the block's abuse, administrative, and technical contact is DISA-Columbus (Defense Information Systems Agency), reachable at disa.columbus.ns.mbx.arin-registrations@mail.mil. This is a US Department of Defense resource, not a commercial ISP or enterprise network, and it has no standalone RDAP record: querying whois.arin.net for AS499 directly 404s, confirming ARIN only ever registered and serves the block as a unit. Every routing-data source consulted — RIPEstat routing-status/as-overview, CAIDA ASRank, bgp.he.net, and ipinfo.io — agrees the ASN is completely dormant: zero announced IPv4 or IPv6 prefixes, zero observed BGP peers out of 327 v4/321 v6 RIS peers, zero upstreams, and a customer cone limited to itself with zero prefixes and zero addresses. CAIDA has never observed it in its topology (seen=false), and its ASRank of 79,459 sits near the bottom of the global table, consistent with a registered-but-unrouted government allocation. No public abuse signal was found: AS499 is absent from the Spamhaus ASN-DROP list and produced no hits in the MARC NANOG mailing-list archive as of 2026-07-10, though one community aggregator (GitHub C0nw0nk/ASN-BlackList) could not be checked because its raw file returned HTTP 503 at query time.

Operator

Air Force Systems Networking (ARIN org handle 7ESG; registrant address ties to the 754th Electronic Systems Group, Maxwell AFB-Gunter Annex, AL); block-level abuse/admin/tech contact is DISA-Columbus [Confirmed] — https://rdap.arin.net/registry/autnum/499

Country / RIR

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

Allocated

1989-08-04 (ARIN RDAP autnum TOP-LEVEL registration event for the AS379–AS508 block, which covers AS499 — not the nested REGIS10-ARIN POC entity's own 2009/2026 event dates, which are decoys for a different record); last changed 2008-06-06

[Confirmed] — ARIN RDAP autnum top-level events, corroborated by ipinfo.io/AS499

Org status

ARIN RDAP status Active for the containing AS379–AS508 block, but operationally dormant; AS499 has no standalone REST/RDAP record, confirming it was never separately re-delegated [Confirmed] — https://rdap.arin.net/registry/autnum/499

Contacts

disa.columbus.ns.mbx.arin-registrations@mail.mil; +1-844-347-2457 ext2; DISA-Columbus, 300 North James Road, Whitehall, OH 43213 [Confirmed] — RIPEstat abuse-contact-finder

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal as of 2026-07-10 — not on Spamhaus ASN-DROP; no MARC NANOG archive hits for "AS499"; the C0nw0nk/ASN-BlackList GitHub aggregator returned HTTP 503 and could not be checked, left Unknown rather than asserted

Network & routing

Network type

US Department of Defense / US Air Force military network; not a commercial ISP, hosting, or enterprise operator [Confirmed] — https://rdap.arin.net/registry/autnum/499

Size

dormant — 0 IPv4/IPv6 prefixes announced, 0 addresses; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — RIPEstat routing-status / CAIDA ASRank / bgp.he.net / ipinfo.io (2026-07-10)

Routing/peering

NOT announced — 0 RIS peers seeing it (0/327 v4, 0/321 v6); CAIDA asnDegree total 0 (customer 0, peer 0, provider 0); no upstreams or peers visible in any source [Confirmed]. No operator-published peering policy found; a PeeringDB org profile named "Air Force Systems Networking" (org id 20118) exists but does not clearly list AS499 among its ASNs

[Unknown for peering policy] — https://www.peeringdb.com/org/20118

RPKI

not assessable — AS499 announces no prefixes, so there is nothing to validate; the RIPEstat rpki-validation query was skipped upstream (requires a prefix argument) [Unknown/not applicable]

Notable usage

none identified; the ASN is registered but not actively announcing routes in the global routing table — routing-dormant / reserved-in-practice [Confirmed] — https://bgp.he.net/AS499

Related ASNs

part of the consecutive AS379–AS508 block registered to Air Force Systems Networking (same block/registrant pattern as sibling ASNs in the range, e.g. AS489) [Confirmed] — https://rdap.arin.net/registry/autnum/499

Analyst note

Encountered as a dormant DoD/Air Force legacy ASN inside a large shared ARIN block; no dedicated operator website, IR page, or peering policy could be located, consistent with a non-commercial military resource rather than a missing-data gap.