AS498

AS498 is a legacy autonomous system number falling inside ARIN's AS379–AS508 block, registered under the name AFCONC-BLOCK1-AS to "Air Force Systems Networking," a U.S. Department of Defense / Air Force numbering range. The registrant entity (handle 7ESG) lists an address at Maxwell AFB, Gunter Annex, Alabama, while the administrative, technical, and abuse contact routes to DISA-Columbus in Whitehall, Ohio — consistent with the Defense Information Systems Agency's role managing DoD IP/ASN resources on behalf of the individual services. ARIN's RDAP autnum object records a top-level block registration date of 1989-08-04 and a last-changed date of 2008-06-06; these are distinct from, and should not be confused with, the later dates stamped on the nested entity records for REGIS10-ARIN (2009) and 7ESG (2008), which reflect contact-record edits rather than the block's own registration. Like several neighboring ASNs in this same Air Force block, AS498 is currently dormant: it announces zero IPv4 and zero IPv6 prefixes, has no visible BGP peers or upstreams, and CAIDA's topology crawl marks it unseen. The only historical routing activity on record is a single prefix, 199.251.103.0/24, briefly announced for about four weeks in September–October 2001 and never seen again. No public abuse signal, hijack report, or community discussion was found for AS498 as of July 2026.

Operator

Air Force Systems Networking (registrant entity 7ESG); block record handle AS379 (AFCONC-BLOCK1-AS) spans AS379–AS508; admin/abuse/technical contact routed to DISA-Columbus [Confirmed] — https://rdap.arin.net/registry/autnum/498

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/498 ; RIPEstat abuse-contact-finder (authoritative_rir: arin)

Allocated

1989-08-04 (ARIN RDAP autnum TOP-LEVEL registration event); last changed 2008-06-06 [Confirmed] — https://rdap.arin.net/registry/autnum/498 (the nested REGIS10-ARIN and 7ESG entity records carry separate, later contact-edit dates and are not the block's registration date)

Org status

ARIN status "Active" for the containing AS379–AS508 block; AS498 itself is dormant/unannounced in live BGP [Confirmed] — https://rdap.arin.net/registry/autnum/498 ; https://bgp.he.net/AS498

Contacts

Registration (REGIS10-ARIN), DISA-Columbus, disa.columbus.ns.mbx.arin-registrations@mail.mil, +1-844-347-2457 ext. 2, 300 North James Road, Whitehall, OH 43213 [Confirmed] — https://rdap.arin.net/registry/autnum/498

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-10 — not listed on bgp.he.net, IPinfo (record flagged "Inactive"), Spamhaus DROP/ASN-DROP, or NANOG mailing-list archives; consistent with a long-dormant unrouted government ASN [Confirmed] — https://bgp.he.net/AS498 ; https://ipinfo.io/AS498 ; https://www.spamhaus.org/resource-hub/dnsbl/the-return-of-the-asn-drop/

Network & routing

Network type

US Department of Defense / Air Force internal numbering block within the AS379–AS508 AFCONC-BLOCK1-AS range; registrant address Maxwell AFB — Gunter Annex, AL, historically associated with the 754th Electronic Systems Group [Likely] — https://rdap.arin.net/registry/autnum/498 ; https://airforce.togetherweserved.com/unit/11470/754th-Electronic-Systems-Group (secondary corroboration only)

Size

dormant — 0 IPv4 prefixes / 0 addresses announced, 0 IPv6 prefixes; customer cone = singleton (itself only, 0 prefixes, 0 addresses) [Confirmed] — https://stat.ripe.net/AS498 ; https://api.asrank.caida.org/v2/restful/asns/498

Routing / peering

NOT currently announced — 0 of 327 RIS peers see v4, 0 of 321 see v6; CAIDA degree totals 0 (customer 0, peer 0, provider 0); no public peering policy exists [Confirmed] — https://stat.ripe.net/AS498 ; https://api.asrank.caida.org/v2/restful/asns/498

Historical routing

single prefix 199.251.103.0/24 observed 2001-09-26 through 2001-10-23, not seen since [Confirmed] — https://stat.ripe.net/AS498

RPKI

not assessable — no prefixes currently announced, so no ROAs exist to validate [Unknown] — https://stat.ripe.net/AS498 (rpki-validation requires a prefix; none supplied)

Notable usage

none observed; AS498 is absent from current global BGP tables [Confirmed] — https://bgp.he.net/AS498 ; https://stat.ripe.net/AS498

Related ASNs

part of the AS379–AS508 AFCONC-BLOCK1-AS block, the same Air Force/DISA numbering range covering sibling ASNs such as AS465 [Confirmed for block range; Likely for sibling-ASN pattern] — https://rdap.arin.net/registry/autnum/498

Analyst note

dormant sub-range of a legacy US Air Force/DISA block; no independent operator website exists; live routing has not been observed since 2001.