AS199

AS199 is a legacy autonomous system number registered under ARIN to Level 3 Parent, LLC, the Lumen Technologies subsidiary that holds the former Level 3 Communications network assets. The ASN handle is CENTURYLINK-LEGACY-LVLT-199 — the name itself records the post-merger lineage: Level 3 was absorbed into CenturyLink (now Lumen) when that acquisition completed on 2017-11-01. The key triage point for AS199 is that it is dormant today. Every routing source consulted (RIPEstat, CAIDA AS Rank, bgp.he.net, bgp.tools) agrees it announces zero IPv4 and zero IPv6 prefixes, is seen by 0 of 327 RIS v4 peers and 0 of 323 v6 peers, has zero visible BGP peers, upstreams, and customers, and holds no IXP memberships. Its CAIDA AS rank of 79,459 sits near the bottom of the global ranking with seen=false and all AS-degree values at 0, reflecting complete routing inactivity; the customer cone is a singleton (the ASN itself, 0 prefixes, 0 addresses). Lumen's active backbone routing runs under other ASNs — principally AS3356 — and Lumen as a parent is a Tier 1 global carrier with a selective settlement-free peering policy (500 Gbps global / 250 Gbps regional thresholds, peering@lumen.com). An RPKI-ROA contact entity (RPKIR-ARIN, registered 2024-06-17) exists in the registry for creating ROAs, but with zero active originations no ROA coverage is exercised. No notable public abuse signal was found as of 2026-06-19 — AS199 is absent from Spamhaus ASN-DROP (430 records checked), has no CleanTalk or AbuseIPDB AS-level listing, and is unmentioned in NANOG abuse threads — consistent with a clean, dormant ASN held by a major carrier.

Operator

Level 3 Parent, LLC (subsidiary of Lumen Technologies, Inc.; ARIN org handle LPL-141) [Confirmed] — https://rdap.arin.net/registry/autnum/199, https://www.peeringdb.com/asn/199

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/199

Allocated

2002-06-05 (ARIN registry autnum date, NOT an IEEE date — IEEE publishes no ASN registration dates); autnum top-level last changed 2019-12-04 (likely a name/record change during the Level 3 → CenturyLink/Lumen rebranding)

[Confirmed] — https://rdap.arin.net/registry/autnum/199, https://bgp.tools/as/199

Org status

active corporate entity — Level 3 Parent, LLC (org handle LPL-141), a subsidiary of Lumen Technologies, Inc.; ARIN status ok; HQ 100 CenturyLink Drive, Monroe, LA 71203, US. Standalone Level 3 Communications became defunct 2017-11-01 on completion of the CenturyLink acquisition

[Confirmed] — https://rdap.arin.net/registry/autnum/199, https://en.wikipedia.org/wiki/Level_3_Communications

Contacts

abuse@level3.com / abuse@aup.lumen.com, +1-877-453-8353 (handle LAC56-ARIN); admin/tech ipadmin@lumen.com, ipadmin@centurylink.com (handle APL7-ARIN) [Confirmed] — https://rdap.arin.net/registry/autnum/199

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-19 — absent from Spamhaus ASN-DROP (430 records checked), no CleanTalk or AbuseIPDB AS-level listing (both returned 404), and no AS199-specific NANOG abuse discussion. Zero active prefixes means no current attack surface attributable to this ASN [Confirmed for Spamhaus absence; Likely for the others] — https://www.spamhaus.org/drop/asndrop.json, https://cleantalk.org/blacklists/asn

Network & routing

Network type

legacy/inactive ASN within the Lumen / Level 3 portfolio; the broader parent is a Tier 1 global backbone carrier. AS199 currently announces nothing; active routing for this family runs under other ASNs (principally AS3356)

[Confirmed] — https://bgp.tools/as/199, https://ipgeolocation.io/browse/asn/AS199

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 AS Rank / bgp.he.net / bgp.tools (2026-06)

Routing/peering

NOT announced — 0 of 327 RIS v4 peers and 0 of 323 v6 peers see it; CAIDA degree total 0 (customer 0, peer 0, provider 0), seen=false; no upstreams or peers visible in any source [Confirmed]. Lumen's published settlement-free peering policy is Selective (500 Gbps global / 250 Gbps regional, RPKI filtering, 24x7 NOC, peering@lumen.com)

[Confirmed for the parent policy] — https://www.lumen.com/en-us/about/legal/peering-policy.html, https://api.asrank.caida.org/v2/graphql

RPKI

an RPKI-ROA contact entity (RPKIR-ARIN, registered 2024-06-17) is present for creating ROAs (rpki-roa@lumen.com), but with no active prefixes there are no ROAs to validate; AS-SET LEVEL3 / as-lumen-asns (132 ASNs) [Confirmed] — https://rdap.arin.net/registry/autnum/199, https://bgp.tools/as/199

Notable usage

AS199 is a dormant legacy ASN from the former Level 3 Communications network (pre-CenturyLink/Lumen merger), part of the broader Lumen/Level 3 AS-SET portfolio (132 ASNs). Lumen operates global fiber, Dedicated Internet Access, DDoS mitigation, SD-WAN, dark fiber, wavelengths to 400 Gbps, and colocation; its primary active backbone ASN is AS3356

[Confirmed] — https://bgp.tools/as/199, https://www.lumen.com/en-us/about.html

Related ASNs

AS3356 (Lumen/Level 3 primary active backbone); part of AS-SET LEVEL3 / as-lumen-asns (132 ASNs) [Confirmed for AS3356; Likely for the broader set per third-party DB]

Analyst note

Encountered as a dormant legacy ASN whose handle (CENTURYLINK-LEGACY-LVLT-199) records the Level 3 → Lumen lineage. WHOIS resolves to Level 3 Parent, LLC, but live routing is under AS3356, not AS199. Clean, inactive ASN. Entity-level registration dates in entities[] (LPL-141 2018-02-06; APL7-ARIN 2003-01-28; LAC56-ARIN 2021-01-14) are contact-object dates, NOT the ASN allocation date (2002-06-05).