AS595

AS595 is a legacy autonomous system number registered under ARIN to Level 3 Parent, LLC, the entity now operating as part of Lumen Technologies (formerly CenturyLink, and before that Level 3 Communications). The ARIN autnum record's top-level registration event dates the allocation to 2002-06-05, with the record itself last changed 2019-12-04. Despite an active RIR registration, AS595 is currently dark in the global routing table: RIPEstat, CAIDA AS Rank, bgp.he.net, and bgp.tools independently agree it announces zero IPv4 and zero IPv6 prefixes, and bgp.he.net specifically notes the ASN has not been visible in global BGP since November 17, 2024. Its CAIDA AS rank sits at 79,459 with a customer cone of exactly one ASN — itself — reflecting zero downstream customers, zero peers, and zero upstream providers today. Historically, bgp.he.net's cached data shows one observed IPv4 BGP session with AS59588 (Al Atheer Telecommunication, Iraq), though this predates the ASN's withdrawal from the routing table and should not be read as a live adjacency. ARIN's record also lists a dedicated RPKI-ROA administrative contact under the Lumen umbrella, indicating the parent organization maintains ROA-issuance infrastructure across its ASN portfolio even where a specific ASN, like this one, is not actively originating routes. No public abuse signal was found tied to AS595 specifically.

Operator

Level 3 Parent, LLC (subsidiary of Lumen Technologies, Inc.; formerly CenturyLink / Level 3 Communications) [Confirmed] — https://rdap.arin.net/registry/autnum/595

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/595

Allocated

2002-06-05 (ARIN autnum top-level registration event, corroborated independently by two research angles); last changed 2019-12-04 [Confirmed] — https://rdap.arin.net/registry/autnum/595

Org status

Active per ARIN registry status; parent Lumen Technologies, Inc. is publicly traded (NYSE: LUMN) [Confirmed] — https://rdap.arin.net/registry/autnum/595, https://www.lumen.com/en-us/about.html

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-16 (Spamhaus ASN-DROP list and JSON feed, NANOG mailing-list archives checked); direct AbuseIPDB lookup returned HTTP 403 and is excluded rather than assumed clean

Abuse contact

abuse@level3.com (validated ARIN abuse-role entity LAC56-ARIN); general Lumen mailbox abuse@aup.lumen.com also referenced in org remarks

Network & routing

Network type

legacy/internal ASN within the Level 3 594–598 block; part of Lumen's Tier-1 backbone but not itself actively announcing routes [Likely] — https://www.peeringdb.com/asn/595 (no listing, HTTP 404)

Routing status

0 IPv4 / 0 IPv6 prefixes announced; not visible in global BGP since 2024-11-17 [Confirmed] — https://stat.ripe.net/AS595, https://asrank.caida.org/asns/595, https://bgp.he.net/AS595, https://bgp.tools/as/595

CAIDA AS Rank

#79459; customer cone = singleton (1 ASN, 0 prefixes, 0 addresses); degree total/customer/peer/provider = 0 [Confirmed] — https://asrank.caida.org/asns/595

Upstreams/Peers

none currently observed (0 upstreams, 0 live peers); historical cached IPv4 peer AS59588 (Al Atheer Telecommunication, Iraq), not corroborated as currently active [Likely] — https://bgp.he.net/AS595

Peering policy

Unknown for AS595 specifically — no PeeringDB listing exists [Unknown] — https://www.peeringdb.com/asn/595

RPKI

not assessable via ROA validation (0 announced prefixes, no prefix to validate); Lumen maintains a dedicated RPKI-ROA administrative entity (handle RPKIR-ARIN, registered 2024-06-17) for ROA creation across its ASN portfolio [Likely] — https://rdap.arin.net/registry/autnum/595

Geo footprint

Registrant address 100 CenturyLink Drive, Monroe, LA 71203; secondary admin/technical POC 1025 Eldorado Blvd., Broomfield, CO 80021 [Confirmed] — https://rdap.arin.net/registry/autnum/595

Notable usage

Unknown — no public documentation identifies a specific operational role for AS595 [Unknown]

Related ASNs

AS3356 cited as Lumen's actively-peered flagship ASN, offered only as contrast — not directly linked to AS595 in RDAP [Likely] — https://assets.lumen.com/is/content/Lumen/lumen-internet-routing-registry-guide

ASN name / handle

CENTURYLINK-LEGACY-LVLT-595 [Confirmed] — https://rdap.arin.net/registry/autnum/595

Analyst note

Legacy Level 3/CenturyLink-Lumen ASN, RIR-active but unrouted since November 2024; sits within the sequential 594–598 Level 3 legacy ASN block.