Autonomous System
AS31655 Gamma Telecom Holdings Ltd
ISPActiveUnited KingdomRIPE
AS31655 (ASN-GammaTelecom) is an ISP network operated by Gamma Telecom Holdings Ltd in United Kingdom, registered with RIPE. It has 36 IPv4 prefixes with 614,400 addresses and 3 IPv6 prefixes, which makes it the 595th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses614,400in 36 prefixes
IPv6 prefixes3≈ 1.9 × 10³⁰ addresses
Size rank#595of 82,200 active ASNs
Details
OrganizationGamma Telecom Holdings Ltd
AS nameASN-GammaTelecom
Websitegamma.co.uk
Country United Kingdom (GB)
Network typeISP
RegistryRIPE
Abuse contactabuse@gamma.co.uk
Registered2004-07-02
Last updated2026-09-02
IPv4 prefixes
36 prefixes · 614,400 addresses| Network | Addresses | First – last address |
|---|---|---|
| 51.52.0.0/16 | 65,536 | 51.52.0.0 – 51.52.255.255 |
| 51.219.0.0/16 | 65,536 | 51.219.0.0 – 51.219.255.255 |
| 79.74.0.0/16 | 65,536 | 79.74.0.0 – 79.74.255.255 |
| 92.207.0.0/16 | 65,536 | 92.207.0.0 – 92.207.255.255 |
| 157.125.0.0/16 | 65,536 | 157.125.0.0 – 157.125.255.255 |
| 157.231.0.0/16 | 65,536 | 157.231.0.0 – 157.231.255.255 |
| 62.223.128.0/17 | 32,768 | 62.223.128.0 – 62.223.255.255 |
| 138.248.128.0/17 | 32,768 | 138.248.128.0 – 138.248.255.255 |
| 151.2.128.0/17 | 32,768 | 151.2.128.0 – 151.2.255.255 |
| 164.39.128.0/17 | 32,768 | 164.39.128.0 – 164.39.255.255 |
| 88.215.0.0/18 | 16,384 | 88.215.0.0 – 88.215.63.255 |
| 188.66.64.0/18 | 16,384 | 188.66.64.0 – 188.66.127.255 |
| 5.2.96.0/19 | 8,192 | 5.2.96.0 – 5.2.127.255 |
| 195.162.96.0/19 | 8,192 | 195.162.96.0 – 195.162.127.255 |
| 80.252.64.0/20 | 4,096 | 80.252.64.0 – 80.252.79.255 |
| 89.213.16.0/20 | 4,096 | 89.213.16.0 – 89.213.31.255 |
| 138.248.16.0/20 | 4,096 | 138.248.16.0 – 138.248.31.255 |
| 138.248.32.0/20 | 4,096 | 138.248.32.0 – 138.248.47.255 |
| 193.39.16.0/20 | 4,096 | 193.39.16.0 – 193.39.31.255 |
| 213.218.192.0/20 | 4,096 | 213.218.192.0 – 213.218.207.255 |
| 46.227.48.0/21 | 2,048 | 46.227.48.0 – 46.227.55.255 |
| 89.213.8.0/21 | 2,048 | 89.213.8.0 – 89.213.15.255 |
| 89.213.32.0/21 | 2,048 | 89.213.32.0 – 89.213.39.255 |
| 5.144.156.0/22 | 1,024 | 5.144.156.0 – 5.144.159.255 |
| 151.2.128.0/22 | 1,024 | 151.2.128.0 – 151.2.131.255 |
51.52.0.0/16 51.219.0.0/16 79.74.0.0/16 92.207.0.0/16 157.125.0.0/16 157.231.0.0/16 62.223.128.0/17 138.248.128.0/17 151.2.128.0/17 164.39.128.0/17 88.215.0.0/18 188.66.64.0/18 5.2.96.0/19 195.162.96.0/19 80.252.64.0/20 89.213.16.0/20 138.248.16.0/20 138.248.32.0/20 193.39.16.0/20 213.218.192.0/20 46.227.48.0/21 89.213.8.0/21 89.213.32.0/21 5.144.156.0/22 151.2.128.0/22
The 25 largest of 36. The API and the database have all of them.
IPv6 prefixes
3 prefixes- 2a02:c1c0::/29
- 2a02:df80::/29
- 2a04:4440::/29
2a02:c1c0::/29 2a02:df80::/29 2a04:4440::/29
Query AS31655 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=AS31655&key=YOUR_API_KEY"Any address in its prefixes resolves to AS31655, with or without a key:
curl "https://api.ipapi.is/?q=51.52.0.1"