$ query “AS203” --type=asn → 1 result(s)
AS203 — CENTURYLINK-LEGACY-LVLT-203
Level 3 Parent LLC
AS203 is a residential access provider run by Level 3 Parent LLC, based in the United States since 2002. The network announces a solid 122 368 IPv4 addresses, including a /16. Supports IPv6.
Basic Information
- Country
- 🇺🇸 United States
- Category
- Internet Service Provider
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- June 05, 2002
- Last Changed
- March 04, 2026
- Last Seen
- March 05, 2026
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 122 / 77
- IPv6 Prefixes (raw / aggregated)
- 1 / 1
- IPv4 Addresses
- 122 368
- Largest IPv4 Prefix
- /16 (65 536 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇺🇸 US (63 IPs), 🇦🇺 AU (8 IPs), 🇸🇦 SA (2 IPs), 🇩🇪 DE, 🇧🇬 BG, 🇿🇿 ZZ
- Prefix Changed
- March 05, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs out of 122 368 total (0.00%)
Connectivity Summary
- Upstream Providers
- 1 upstream autonomous systems providing transit
- Peers
- 0 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 1 downstream autonomous systems buying transit
- Degree
- 2 unique BGP neighbors (providers + customers + peers)
- Reach
- 59 — customer cone size measuring network influence
- Degree Rank
- #29 306
- Reach Rank
- #1 411
Upstream Providers (1)
- AS3356 — LEVEL3 (Tier-1 transit)
Prefix Lists
IPv4 Prefixes (122 total)
- 156.42.0.0/16 (65 536 addresses)
- 129.220.64.0/19 (8 192 addresses)
- 161.209.192.0/19 (8 192 addresses)
- 129.220.48.0/20 (4 096 addresses)
- 161.209.96.0/20 (4 096 addresses)
- 216.163.240.0/20 (4 096 addresses)
- 216.235.200.0/21 (2 048 addresses)
- 63.128.0.0/22 (1 024 addresses)
- 63.128.8.0/22 (1 024 addresses)
- 199.68.16.0/22 (1 024 addresses)
- 205.139.104.0/22 (1 024 addresses)
- 209.67.132.0/22 (1 024 addresses)
- 209.67.136.0/22 (1 024 addresses)
- 209.164.192.0/22 (1 024 addresses)
- 63.150.74.0/23 (512 addresses)
- 64.241.120.0/23 (512 addresses)
- 65.240.184.0/23 (512 addresses)
- 143.199.140.0/23 (512 addresses)
- 148.59.168.0/23 (512 addresses)
- 204.153.154.0/23 (512 addresses)
- 205.139.102.0/23 (512 addresses)
- 209.164.204.0/23 (512 addresses)
- 209.164.208.0/23 (512 addresses)
- 209.164.220.0/23 (512 addresses)
- 212.138.252.0/23 (512 addresses)
- 8.7.155.0/24 (256 addresses)
- 8.15.229.0/24 (256 addresses)
- 8.18.63.0/24 (256 addresses)
- 8.25.26.0/24 (256 addresses)
- 8.36.90.0/24 (256 addresses)
- 8.44.205.0/24 (256 addresses)
- 38.107.240.0/24 (256 addresses)
- 50.58.252.0/24 (256 addresses)
- 62.67.222.0/24 (256 addresses)
- 63.106.6.0/24 (256 addresses)
- 63.128.7.0/24 (256 addresses)
- 63.128.12.0/24 (256 addresses)
- 63.128.14.0/24 (256 addresses)
- 63.128.20.0/24 (256 addresses)
- 63.128.24.0/24 (256 addresses)
- 63.144.218.0/24 (256 addresses)
- 64.22.148.0/24 (256 addresses)
- 64.208.127.0/24 (256 addresses)
- 64.209.141.0/24 (256 addresses)
- 65.222.131.0/24 (256 addresses)
- 66.193.107.0/24 (256 addresses)
- 66.194.187.0/24 (256 addresses)
- 67.96.131.0/24 (256 addresses)
- 128.177.179.0/24 (256 addresses)
- 143.199.28.0/24 (256 addresses)
IPv6 Prefixes (1 total)
- 2804:cf4::/32