Autonomous System
AS203 Level 3 Parent, LLC
ISPActiveUnited StatesARIN
AS203 (CENTURYLINK-LEGACY-LVLT-203) is an ISP network operated by Level 3 Parent, LLC in United States, registered with ARIN. It has 113 IPv4 prefixes with 324,864 addresses, which makes it the 902nd largest of 82,558 active autonomous systems by IPv4 space.
IPv4 addresses324,864in 113 prefixes
IPv6 prefixes0none
Size rank#902of 82,558 active ASNs
Details
OrganizationLevel 3 Parent, LLC
AS nameCENTURYLINK-LEGACY-LVLT-203
Websitelevel3.com
Country United States (US)
Network typeISP
RegistryARIN
Abuse contactabuse@level3.com
Registered2002-06-05
Last updated2019-12-04
IPv4 prefixes
113 prefixes · 324,864 addresses| Network | Addresses | First – last address |
|---|---|---|
| 149.21.0.0/16 | 65,536 | 149.21.0.0 – 149.21.255.255 |
| 170.46.0.0/16 | 65,536 | 170.46.0.0 – 170.46.255.255 |
| 143.112.0.0/17 | 32,768 | 143.112.0.0 – 143.112.127.255 |
| 143.112.128.0/18 | 16,384 | 143.112.128.0 – 143.112.191.255 |
| 206.203.64.0/18 | 16,384 | 206.203.64.0 – 206.203.127.255 |
| 143.112.192.0/19 | 8,192 | 143.112.192.0 – 143.112.223.255 |
| 143.112.224.0/19 | 8,192 | 143.112.224.0 – 143.112.255.255 |
| 156.42.0.0/19 | 8,192 | 156.42.0.0 – 156.42.31.255 |
| 156.42.32.0/19 | 8,192 | 156.42.32.0 – 156.42.63.255 |
| 156.42.64.0/19 | 8,192 | 156.42.64.0 – 156.42.95.255 |
| 156.42.96.0/19 | 8,192 | 156.42.96.0 – 156.42.127.255 |
| 156.42.128.0/19 | 8,192 | 156.42.128.0 – 156.42.159.255 |
| 156.42.160.0/19 | 8,192 | 156.42.160.0 – 156.42.191.255 |
| 156.42.192.0/19 | 8,192 | 156.42.192.0 – 156.42.223.255 |
| 156.42.224.0/19 | 8,192 | 156.42.224.0 – 156.42.255.255 |
| 161.209.192.0/19 | 8,192 | 161.209.192.0 – 161.209.223.255 |
| 161.209.96.0/20 | 4,096 | 161.209.96.0 – 161.209.111.255 |
| 216.235.200.0/21 | 2,048 | 216.235.200.0 – 216.235.207.255 |
| 63.128.0.0/22 | 1,024 | 63.128.0.0 – 63.128.3.255 |
| 63.128.8.0/22 | 1,024 | 63.128.8.0 – 63.128.11.255 |
| 143.112.68.0/22 | 1,024 | 143.112.68.0 – 143.112.71.255 |
| 143.112.128.0/22 | 1,024 | 143.112.128.0 – 143.112.131.255 |
| 143.112.144.0/22 | 1,024 | 143.112.144.0 – 143.112.147.255 |
| 205.139.104.0/22 | 1,024 | 205.139.104.0 – 205.139.107.255 |
| 209.67.132.0/22 | 1,024 | 209.67.132.0 – 209.67.135.255 |
149.21.0.0/16 170.46.0.0/16 143.112.0.0/17 143.112.128.0/18 206.203.64.0/18 143.112.192.0/19 143.112.224.0/19 156.42.0.0/19 156.42.32.0/19 156.42.64.0/19 156.42.96.0/19 156.42.128.0/19 156.42.160.0/19 156.42.192.0/19 156.42.224.0/19 161.209.192.0/19 161.209.96.0/20 216.235.200.0/21 63.128.0.0/22 63.128.8.0/22 143.112.68.0/22 143.112.128.0/22 143.112.144.0/22 205.139.104.0/22 209.67.132.0/22
The 25 largest of 113. The API and the database have all of them.
IPv6 prefixes
No IPv6 prefixes.
Query AS203 with the API
The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day.
curl "https://api.ipapi.is/?q=AS203&key=YOUR_API_KEY"Any address in its prefixes resolves to AS203, with or without a key:
curl "https://api.ipapi.is/?q=149.21.0.1"Other networks of Level 3 Parent, LLC
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