AS524

AS524 (CIRION-524) is an ARIN-allocated autonomous system number registered on 2002-06-05, now held by Cirion Technologies Solutions, LLC, a Latin America-focused carrier-neutral fiber network and data center operator headquartered at 801 Brickell Avenue, Suite 2400, Miami, FL. The registrant's ARIN organization handle, GCASL, was itself registered in January 2022, consistent with a corporate restructuring — plausibly tied to the divestiture of Latin American telecom assets that became Cirion — though no operator-published page was found confirming a specific prior-owner lineage (e.g., Level 3, Global Crossing, or Lumen/CenturyLink), so that history is left unverified rather than asserted. Operationally, AS524 is dormant: RIPEstat, CAIDA ASRank, and third-party BGP trackers (bgp.tools, bgp.he.net) independently agree it originates zero IPv4 and zero IPv6 prefixes, is visible to none of RIPE RIS's 327 IPv4 or 321 IPv6 peers, and carries a customer cone of just itself. Cirion's actual production routing runs under separate regional ASNs — AS13835 (Argentina), AS21838 (Chile), and AS11415 (Brazil) — none of which are announced under AS524. No PeeringDB net record exists for AS524 specifically, and RPKI posture cannot be evaluated because there is no announced prefix to validate against a ROA. No public abuse signal was found against AS524 as of July 2026 across Spamhaus's live ASN-DROP feed, NANOG mailing-list archives, and BGP hijack trackers, consistent with a dormant, low-abuse-surface legacy allocation held by an otherwise well-established, actively operating regional carrier.

Operator

Cirion Technologies Solutions, LLC (ARIN org handle GCASL, 801 Brickell Avenue, Suite 2400, Miami, FL 33131-2951, US) [Confirmed] — https://rdap.arin.net/registry/autnum/524

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/524

Allocated

2002-06-05, read from the RDAP autnum TOP-LEVEL registration event (not the nested GCASL org / ABUSE9424-ARIN / DUQUE23-ARIN contact-record dates, which are 2022-01-27, 2025-10-01, and 2025-06-10 respectively); last changed 2024-03-26 [Confirmed, two independent angles: A1 canonical JSON and A3 routing, plus bgp.tools corroboration] — https://rdap.arin.net/registry/autnum/524, https://bgp.tools/as/524

Org status

active independent operating company (Cirion Technologies Solutions, LLC); RDAP registry status for AS524 itself is "active" (i.e., a valid allocation record) despite carrying zero announced prefixes; ARIN org handle GCASL was registered 2022-01-27

[Confirmed] — https://rdap.arin.net/registry/autnum/524

Contacts

abuse@ciriontechnologies.com (ARIN handle ABUSE9424-ARIN); technical/administrative contact Claudia Duque (DUQUE23-ARIN) [Confirmed] — https://rdap.arin.net/registry/entity/ABUSE9424-ARIN

Security/abuse context (NEUTRAL, DATED)

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

Network & routing

Network type

legacy/holding ASN under a Latin America-focused carrier-neutral fiber network and data center operator; not currently announcing any prefixes (Cirion's active regional ASNs are AS13835 Argentina, AS21838 Chile, AS11415 Brazil)

[Confirmed] — https://bgp.tools/as/524, https://www.ciriontechnologies.com/en/

Size

dormant — 0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — RIPEstat routing-status / CAIDA ASRank for AS524 (2026-07-10/11)

Routing/peering

NOT announced — 0/327 RIS peers seeing it on v4, 0/321 on v6; CAIDA degree total 0 (customer 0, peer 0, provider 0); no PeeringDB net record found for AS524 specifically (Cirion's regional ASNs, e.g. AS13835, carry their own PeeringDB records with an Open policy)

[Confirmed] — RIPEstat routing-status, CAIDA ASRank, https://www.peeringdb.com/org/35201

RPKI

not assessable — AS524 announces no prefixes, so RIPEstat's rpki-validation endpoint was skipped (it requires a prefix) and there is nothing to validate against a ROA [Confirmed] — RIPEstat rpki-validation response for AS524

Notable usage

no usage specific to AS524 identified; the registrant, Cirion Technologies, is a Latin American digital-infrastructure operator (100,000+ km fiber, 18+ data centers, 5,500+ customers including AWS, Google Cloud, Oracle) but its production routing is carried on other ASNs, not AS524 [Likely] — https://www.ciriontechnologies.com/en/, https://press.ciriontechnologies.com/en/2026/05/19/launches-network-as-a-service-latin-america-own-fiber/

Related ASNs

AS13835 (Argentina), AS21838 (Chile), AS11415 (Brazil) — Cirion's actively routed regional ASNs [Confirmed] — https://bgp.tools/as/524, https://www.peeringdb.com/org/35201

Analyst note

dormant legacy ASN registered to Cirion Technologies Solutions, LLC (a well-established, actively operating LatAm carrier-neutral fiber/data-center provider); the GCASL org handle's 2022 registration date hints at a corporate restructuring but no operator-published source confirms a specific prior-owner lineage (e.g. Level 3/Global Crossing/Lumen), so that detail is left Unknown rather than asserted.