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 121 IPv4 prefixes with 327,168 addresses, which makes it the 900th largest of 82,283 active autonomous systems by IPv4 space.
IPv4 addresses327,168in 121 prefixes
IPv6 prefixes0none
Size rank#900of 82,283 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
121 prefixes · 327,168 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 121. 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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