Autonomous System
AS199741 TransitX Ltd
HostingActiveUnited KingdomRIPE
AS199741 (TRANSITX-BYOIP-Customers) is a hosting network operated by TransitX Ltd in United Kingdom, registered with RIPE. It has 137 IPv4 prefixes with 36,608 addresses and 1 IPv6 prefix, which makes it the 4,976th largest of 82,558 active autonomous systems by IPv4 space.
IPv4 addresses36,608in 137 prefixes
IPv6 prefixes1≈ 1.2 × 10²⁴ addresses
Size rank#4,976of 82,558 active ASNs
Details
OrganizationTransitX Ltd
AS nameTRANSITX-BYOIP-Customers
Websitetransitx.net
Country United Kingdom (GB)
Network typeHosting
RegistryRIPE
Abuse contactnetworks@transitx.net
Registered2026-03-26
Last updated2026-04-28
IPv4 prefixes
137 prefixes · 36,608 addresses| Network | Addresses | First – last address |
|---|---|---|
| 45.11.236.0/23 | 512 | 45.11.236.0 – 45.11.237.255 |
| 45.11.238.0/23 | 512 | 45.11.238.0 – 45.11.239.255 |
| 45.155.100.0/23 | 512 | 45.155.100.0 – 45.155.101.255 |
| 51.241.184.0/23 | 512 | 51.241.184.0 – 51.241.185.255 |
| 96.9.214.0/23 | 512 | 96.9.214.0 – 96.9.215.255 |
| 185.113.128.0/23 | 512 | 185.113.128.0 – 185.113.129.255 |
| 5.157.128.0/24 | 256 | 5.157.128.0 – 5.157.128.255 |
| 5.181.124.0/24 | 256 | 5.181.124.0 – 5.181.124.255 |
| 5.182.35.0/24 | 256 | 5.182.35.0 – 5.182.35.255 |
| 5.252.78.0/24 | 256 | 5.252.78.0 – 5.252.78.255 |
| 31.57.48.0/24 | 256 | 31.57.48.0 – 31.57.48.255 |
| 31.57.102.0/24 | 256 | 31.57.102.0 – 31.57.102.255 |
| 45.13.30.0/24 | 256 | 45.13.30.0 – 45.13.30.255 |
| 45.43.86.0/24 | 256 | 45.43.86.0 – 45.43.86.255 |
| 45.86.203.0/24 | 256 | 45.86.203.0 – 45.86.203.255 |
| 45.128.223.0/24 | 256 | 45.128.223.0 – 45.128.223.255 |
| 51.194.131.0/24 | 256 | 51.194.131.0 – 51.194.131.255 |
| 51.194.137.0/24 | 256 | 51.194.137.0 – 51.194.137.255 |
| 51.194.139.0/24 | 256 | 51.194.139.0 – 51.194.139.255 |
| 51.194.153.0/24 | 256 | 51.194.153.0 – 51.194.153.255 |
| 51.194.164.0/24 | 256 | 51.194.164.0 – 51.194.164.255 |
| 51.194.174.0/24 | 256 | 51.194.174.0 – 51.194.174.255 |
| 51.194.175.0/24 | 256 | 51.194.175.0 – 51.194.175.255 |
| 51.194.190.0/24 | 256 | 51.194.190.0 – 51.194.190.255 |
| 51.241.120.0/24 | 256 | 51.241.120.0 – 51.241.120.255 |
45.11.236.0/23 45.11.238.0/23 45.155.100.0/23 51.241.184.0/23 96.9.214.0/23 185.113.128.0/23 5.157.128.0/24 5.181.124.0/24 5.182.35.0/24 5.252.78.0/24 31.57.48.0/24 31.57.102.0/24 45.13.30.0/24 45.43.86.0/24 45.86.203.0/24 45.128.223.0/24 51.194.131.0/24 51.194.137.0/24 51.194.139.0/24 51.194.153.0/24 51.194.164.0/24 51.194.174.0/24 51.194.175.0/24 51.194.190.0/24 51.241.120.0/24
The 25 largest of 137. The API and the database have all of them.
IPv6 prefixes
1 prefix- 2a0c:b840:2::/48
2a0c:b840:2::/48
Query AS199741 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=AS199741&key=YOUR_API_KEY"Any address in its prefixes resolves to AS199741, with or without a key:
curl "https://api.ipapi.is/?q=45.11.236.1"