Autonomous System
AS61231 Neos Networks Limited
ISPActiveUnited KingdomRIPE
AS61231 (Neos-Networks) is an ISP network operated by Neos Networks Limited in United Kingdom, registered with RIPE. It has 8 IPv4 prefixes with 36,864 addresses and 1 IPv6 prefix, which makes it the 4,960th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses36,864in 8 prefixes
IPv6 prefixes1≈ 6.3 × 10²⁹ addresses
Size rank#4,960of 82,200 active ASNs
Details
OrganizationNeos Networks Limited
AS nameNeos-Networks
Websiteneosnetworks.com
Country United Kingdom (GB)
Network typeISP
RegistryRIPE
Abuse contactethernet.tier3@neosnetworks.com
Registered2012-12-28
Last updated2026-09-10
IPv4 prefixes
8 prefixes · 36,864 addresses| Network | Addresses | First – last address |
|---|---|---|
| 161.12.0.0/17 | 32,768 | 161.12.0.0 – 161.12.127.255 |
| 155.136.224.0/22 | 1,024 | 155.136.224.0 – 155.136.227.255 |
| 185.14.144.0/22 | 1,024 | 185.14.144.0 – 185.14.147.255 |
| 155.136.198.0/23 | 512 | 155.136.198.0 – 155.136.199.255 |
| 155.136.230.0/23 | 512 | 155.136.230.0 – 155.136.231.255 |
| 155.136.232.0/23 | 512 | 155.136.232.0 – 155.136.233.255 |
| 194.169.150.0/24 | 256 | 194.169.150.0 – 194.169.150.255 |
| 194.169.151.0/24 | 256 | 194.169.151.0 – 194.169.151.255 |
161.12.0.0/17 155.136.224.0/22 185.14.144.0/22 155.136.198.0/23 155.136.230.0/23 155.136.232.0/23 194.169.150.0/24 194.169.151.0/24
IPv6 prefixes
1 prefix- 2a02:f9c0::/29
2a02:f9c0::/29
Query AS61231 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=AS61231&key=YOUR_API_KEY"Any address in its prefixes resolves to AS61231, with or without a key:
curl "https://api.ipapi.is/?q=161.12.0.1"