Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS203

Announcement observedARIN

Level 3 Parent, LLC · CENTURYLINK-LEGACY-LVLT-203

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active11/1/2026, 22:27:51Snapshot expired

View network topology RDAP registration

ASN: AS203
Registration country: United States
Name: Level 3 Parent, LLC
Abbreviation: CENTURYLINK-LEGACY-LVLT-203
Registration date: 6/5/2002, 04:00:00
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
128.177.179.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
130.174.201.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	9/16/2026, 16:00:00	✓	×	Historical record
130.174.202.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 16:00:00	9/15/2026, 16:00:00	✓	×	Historical record
143.112.0.0/17BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
143.112.128.0/18BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
143.112.128.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
143.112.144.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
143.112.192.0/19BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
143.112.224.0/19BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
143.112.68.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
143.199.109.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
143.199.135.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
143.199.140.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
143.199.145.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
143.199.222.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
143.199.28.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
143.199.96.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
148.59.168.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
148.59.169.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
149.21.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
156.42.0.0/19BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
156.42.128.0/19BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
156.42.160.0/19BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
156.42.192.0/19BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
156.42.224.0/19BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
156.42.32.0/19BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
156.42.64.0/19BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
156.42.96.0/19BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
158.120.127.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
161.209.100.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
161.209.101.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
161.209.102.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
161.209.103.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
161.209.111.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
161.209.192.0/19BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
161.209.225.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
161.209.96.0/20BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
161.209.96.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
161.209.97.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
161.209.98.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
161.209.99.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
161.7.129.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	10/27/2026, 16:00:00	10/30/2026, 16:00:00	✓	×	Currently valid
161.7.38.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	10/27/2026, 16:00:00	10/30/2026, 16:00:00	✓	×	Currently valid
170.22.90.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
170.233.7.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	10/20/2026, 08:00:00	10/20/2026, 08:00:00	✓	×	Historical record
170.46.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
170.46.10.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
170.46.132.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
170.46.150.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid
170.46.155.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	11/1/2026, 16:00:00	✓	×	Currently valid

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: Level 3 Parent, LLC
RIR: ARIN
Registration country: United States
Registration date: 6/5/2002, 04:00:00
Abuse contact: abuse@level3.com

Snapshot trend

11/1/2026, 22:27:51126 v41 v61 Upstream · 0 Uncertain

9/29/2026, 06:12:15157 v42 v61 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · iana-rdap-asn-bootstrap · rir-rdap-asn · cha-la-bgp-observations