AS529

AS529 is a legacy autonomous system number, originally numbered out of ARIN's block but now administered under RIPE NCC's ERX (Early Registration Transfer) program, which migrates pre-RIR-era legacy allocations into the RIPE database. Its registry name, BURTONWOOD-GW1-AS, and the RDAP remark "CDOIM Burtonwood Information Center Burtonwood US Army Depot RAF Burtonwood Burtonwood GB" tie it to a US military network gateway serving the Burtonwood US Army Depot at the former RAF Burtonwood airfield near Warrington, Cheshire, England — a Cold War-era storage and forward-supply depot that closed in June 1994 as excess to NATO requirements. "CDOIM" plausibly reads as a reference to a Directorate of Information Management-style installation communications office, though the exact expansion of the "C" prefix could not be confirmed from any source. The ASN is administratively active in the RIPE database (maintained under ERX-AS529-MNT) but operationally dormant: every routing source consulted — RIPEstat, CAIDA AS Rank, and the RIPE RIS peer network — agrees it announces zero IPv4 and zero IPv6 prefixes and is not visible in the global routing table. It has no PeeringDB record (404 on lookup), no observed BGP peers or upstreams, a singleton CAIDA customer cone (itself only, 0 prefixes, 0 addresses), and a CAIDA AS rank of 79,459 reflecting complete routing inactivity. No public abuse signal was found in Spamhaus ASN-DROP, NANOG archives, or BGP hijack trackers, consistent with an unrouted legacy ASN presenting no live abuse surface. The current administrative/technical contact on file, Liz Williams of Thesis Group, Inc. (Dallas, TX), appears to be a present-day registry-maintenance contact rather than an operational network presence.

RIR / registry status

Originally an ARIN-numbered block resource (IANA 16-bit AS Numbers Registry, block 1-1876, "Assigned by ARIN"), now administered via RIPE NCC's ERX legacy-transfer program (maintainer handle ERX-AS529-MNT); registry status = active

[Confirmed] — https://rdap.db.ripe.net/autnum/529, https://stat.ripe.net/data/as-overview/data.json?resource=529

Allocated

2002-08-21 (RIPE RDAP autnum top-level registration event, eventDate 2002-08-21T16:06:05Z); last changed 2017-11-15 [Confirmed, two angles: A2 and A3 independently read the same top-level events[] entry] — https://rdap.db.ripe.net/autnum/529. Note: this registration date most likely reflects the ERX migration of the legacy record into RIPE's database rather than the AS number's original assignment decades earlier, but no earlier first-party RIR date exists for this resource, so 2002-08-21 is recorded as the registry fact on file.

Operator / legal entity

No formal Org object with a distinct legal name is registered for AS529 — only a maintainer placeholder (ERX-AS529-MNT) and an admin/tech contact [Unknown as to a named present-day operating entity] — https://rdap.db.ripe.net/autnum/529

Security/abuse context (NEUTRAL, DATED)

No notable public abuse signal found as of 2026-07-10 — not in the live Spamhaus ASN-DROP feed, NANOG mailing-list archives, or general BGP hijack/route-leak tracker coverage; consistent with a dormant, unrouted legacy ASN presenting no live abuse surface

Abuse contact

None found — RIPEstat abuse-contact-finder returned an empty abuse_contacts[] array

Network & routing

Routing status

NOT announced — 0 of 327 RIS IPv4 peers and 0 of 321 IPv6 peers see it; 0 observed neighbours; 0 IPv4/IPv6 prefixes announced [Confirmed] — https://stat.ripe.net/data/routing-status/data.json?resource=529, https://stat.ripe.net/data/announced-prefixes/data.json?resource=529

CAIDA AS rank / customer cone

rank 79,459; cliqueMember=false, seen=false (never observed originating an announcement); customer cone = singleton (1 ASN, 0 prefixes, 0 addresses); asnDegree total 0 (customer 0, peer 0, provider 0) [Confirmed] — https://api.asrank.caida.org/v2/restful/asns/529

Peering / PeeringDB

No PeeringDB network object exists for ASN 529 (HTTP 404 on lookup); no discoverable peering policy [Confirmed, absence verified live] — https://www.peeringdb.com/api/net?asn=529

RPKI status

Not assessable — AS529 announces no prefixes, so there is no route/prefix to validate against a ROA [Confirmed] — https://stat.ripe.net/data/rpki-validation/data.json?resource=529

ASN / registry name

AS529 — BURTONWOOD-GW1-AS [Confirmed] — https://rdap.db.ripe.net/autnum/529

Historical/notable usage

Gateway ("GW1") for the CDOIM (installation communications/IT office) at Burtonwood US Army Depot, RAF Burtonwood, Cheshire, England — a former USAAF/RAF airfield used as a US Army Cold War storage and forward-supply depot, closed June 1994 [Likely — RDAP remark is Confirmed primary-source; broader "CDOIM series" context (sibling ASNs AS528 AUGSBURG-GW1-AS, AS530 GEOPPINGEN-GW1-AS) corroborated only by web-search snippets] — https://rdap.db.ripe.net/autnum/529, https://en.wikipedia.org/wiki/RAF_Burtonwood

Current contacts

Registrant object ERX-AS529-MNT (maintainer placeholder, no address on file); admin/technical contact Liz Williams, Thesis Group, Inc., 18333 Preston Rd. Suite 500, Dallas, TX 75252, US, tel +1 214 407 8000 (handle LW281-RIPE; e-mail redacted by RIPE for personal-data reasons) [Confirmed as registry data; Unknown as to operational role] — https://rdap.db.ripe.net/autnum/529