Autonomous System
AS204997 FIRST SERVER LIMITED
HostingActiveUnited KingdomRIPE
AS204997 (FIRSTBYTE-AS) is a hosting network operated by FIRST SERVER LIMITED in United Kingdom, registered with RIPE. It has 64 IPv4 prefixes with 16,384 addresses and 15 IPv6 prefixes, which makes it the 7,910th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses16,384in 64 prefixes
IPv6 prefixes15≈ 1.8 × 10²⁵ addresses
Size rank#7,910of 82,200 active ASNs
Details
OrganizationFIRST SERVER LIMITED
AS nameFIRSTBYTE-AS
Websitefirstbyte.pro
Country United Kingdom (GB)
Network typeHosting
RegistryRIPE
Abuse contactaudit@first-server.net
Registered2017-11-22
Last updated2025-05-01
IPv4 prefixes
64 prefixes · 16,384 addresses| Network | Addresses | First – last address |
|---|---|---|
| 45.144.64.0/24 | 256 | 45.144.64.0 – 45.144.64.255 |
| 45.144.65.0/24 | 256 | 45.144.65.0 – 45.144.65.255 |
| 45.144.66.0/24 | 256 | 45.144.66.0 – 45.144.66.255 |
| 45.144.67.0/24 | 256 | 45.144.67.0 – 45.144.67.255 |
| 46.17.104.0/24 | 256 | 46.17.104.0 – 46.17.104.255 |
| 91.217.81.0/24 | 256 | 91.217.81.0 – 91.217.81.255 |
| 104.128.132.0/24 | 256 | 104.128.132.0 – 104.128.132.255 |
| 104.128.136.0/24 | 256 | 104.128.136.0 – 104.128.136.255 |
| 104.128.137.0/24 | 256 | 104.128.137.0 – 104.128.137.255 |
| 104.128.140.0/24 | 256 | 104.128.140.0 – 104.128.140.255 |
| 104.128.141.0/24 | 256 | 104.128.141.0 – 104.128.141.255 |
| 135.136.180.0/24 | 256 | 135.136.180.0 – 135.136.180.255 |
| 135.136.188.0/24 | 256 | 135.136.188.0 – 135.136.188.255 |
| 135.136.191.0/24 | 256 | 135.136.191.0 – 135.136.191.255 |
| 139.28.222.0/24 | 256 | 139.28.222.0 – 139.28.222.255 |
| 139.28.223.0/24 | 256 | 139.28.223.0 – 139.28.223.255 |
| 147.78.64.0/24 | 256 | 147.78.64.0 – 147.78.64.255 |
| 147.78.65.0/24 | 256 | 147.78.65.0 – 147.78.65.255 |
| 147.78.66.0/24 | 256 | 147.78.66.0 – 147.78.66.255 |
| 147.78.67.0/24 | 256 | 147.78.67.0 – 147.78.67.255 |
| 157.228.134.0/24 | 256 | 157.228.134.0 – 157.228.134.255 |
| 157.228.135.0/24 | 256 | 157.228.135.0 – 157.228.135.255 |
| 157.228.136.0/24 | 256 | 157.228.136.0 – 157.228.136.255 |
| 157.228.137.0/24 | 256 | 157.228.137.0 – 157.228.137.255 |
| 157.228.190.0/24 | 256 | 157.228.190.0 – 157.228.190.255 |
45.144.64.0/24 45.144.65.0/24 45.144.66.0/24 45.144.67.0/24 46.17.104.0/24 91.217.81.0/24 104.128.132.0/24 104.128.136.0/24 104.128.137.0/24 104.128.140.0/24 104.128.141.0/24 135.136.180.0/24 135.136.188.0/24 135.136.191.0/24 139.28.222.0/24 139.28.223.0/24 147.78.64.0/24 147.78.65.0/24 147.78.66.0/24 147.78.67.0/24 157.228.134.0/24 157.228.135.0/24 157.228.136.0/24 157.228.137.0/24 157.228.190.0/24
The 25 largest of 64. The API and the database have all of them.
IPv6 prefixes
15 prefixes- 2a04:5200:fb01::/48
- 2a04:5200:fb02::/48
- 2a04:5200:ff00::/48
- 2a04:5200:ff10::/48
- 2a04:5200:fff1::/48
- 2a04:5200:fff2::/48
- 2a04:5200:fff3::/48
- 2a04:5200:fff4::/48
- 2a04:5200:fff5::/48
- 2a04:5200:fff6::/48
- 2a04:5200:fff7::/48
- 2a04:5200:fff8::/48
- 2a04:5200:fff9::/48
- 2a04:5200:ffff::/48
- 2a0c:5d00:3001::/48
2a04:5200:fb01::/48 2a04:5200:fb02::/48 2a04:5200:ff00::/48 2a04:5200:ff10::/48 2a04:5200:fff1::/48 2a04:5200:fff2::/48 2a04:5200:fff3::/48 2a04:5200:fff4::/48 2a04:5200:fff5::/48 2a04:5200:fff6::/48 2a04:5200:fff7::/48 2a04:5200:fff8::/48 2a04:5200:fff9::/48 2a04:5200:ffff::/48 2a0c:5d00:3001::/48
Query AS204997 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=AS204997&key=YOUR_API_KEY"Any address in its prefixes resolves to AS204997, with or without a key:
curl "https://api.ipapi.is/?q=45.144.64.1"Other networks of FIRST SERVER LIMITED
AS200740 FIRST SERVER LIMITED26,880 IPv4 addressesAS205090 FIRST SERVER LIMITED16,640 IPv4 addressesAS204339 FIRST SERVER LIMITED13,056 IPv4 addresses