Autonomous System
AS50300 CustodianDC Limited
HostingActiveUnited KingdomRIPE
AS50300 (CUSTDC) is a hosting network operated by CustodianDC Limited in United Kingdom, registered with RIPE. It has 39 IPv4 prefixes with 10,752 addresses and 7 IPv6 prefixes, which makes it the 9,777th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses10,752in 39 prefixes
IPv6 prefixes7≈ 4.1 × 10²⁶ addresses
Size rank#9,777of 82,200 active ASNs
Details
OrganizationCustodianDC Limited
AS nameCUSTDC
Websitecustodiandc.com
Country United Kingdom (GB)
Network typeHosting
RegistryRIPE
Abuse contactabuse@CustodianDC.com
Registered2009-12-16
Last updated2026-03-20
IPv4 prefixes
39 prefixes · 10,752 addresses| Network | Addresses | First – last address |
|---|---|---|
| 185.14.164.0/22 | 1,024 | 185.14.164.0 – 185.14.167.255 |
| 5.102.168.0/24 | 256 | 5.102.168.0 – 5.102.168.255 |
| 5.102.169.0/24 | 256 | 5.102.169.0 – 5.102.169.255 |
| 5.102.170.0/24 | 256 | 5.102.170.0 – 5.102.170.255 |
| 5.102.171.0/24 | 256 | 5.102.171.0 – 5.102.171.255 |
| 5.102.172.0/24 | 256 | 5.102.172.0 – 5.102.172.255 |
| 5.102.173.0/24 | 256 | 5.102.173.0 – 5.102.173.255 |
| 5.102.174.0/24 | 256 | 5.102.174.0 – 5.102.174.255 |
| 5.102.175.0/24 | 256 | 5.102.175.0 – 5.102.175.255 |
| 92.118.16.0/24 | 256 | 92.118.16.0 – 92.118.16.255 |
| 109.74.240.0/24 | 256 | 109.74.240.0 – 109.74.240.255 |
| 109.74.241.0/24 | 256 | 109.74.241.0 – 109.74.241.255 |
| 109.74.242.0/24 | 256 | 109.74.242.0 – 109.74.242.255 |
| 109.74.243.0/24 | 256 | 109.74.243.0 – 109.74.243.255 |
| 109.74.244.0/24 | 256 | 109.74.244.0 – 109.74.244.255 |
| 109.74.246.0/24 | 256 | 109.74.246.0 – 109.74.246.255 |
| 109.74.247.0/24 | 256 | 109.74.247.0 – 109.74.247.255 |
| 109.74.248.0/24 | 256 | 109.74.248.0 – 109.74.248.255 |
| 109.74.249.0/24 | 256 | 109.74.249.0 – 109.74.249.255 |
| 109.74.250.0/24 | 256 | 109.74.250.0 – 109.74.250.255 |
| 109.74.251.0/24 | 256 | 109.74.251.0 – 109.74.251.255 |
| 109.74.252.0/24 | 256 | 109.74.252.0 – 109.74.252.255 |
| 109.74.255.0/24 | 256 | 109.74.255.0 – 109.74.255.255 |
| 176.12.104.0/24 | 256 | 176.12.104.0 – 176.12.104.255 |
| 176.12.105.0/24 | 256 | 176.12.105.0 – 176.12.105.255 |
185.14.164.0/22 5.102.168.0/24 5.102.169.0/24 5.102.170.0/24 5.102.171.0/24 5.102.172.0/24 5.102.173.0/24 5.102.174.0/24 5.102.175.0/24 92.118.16.0/24 109.74.240.0/24 109.74.241.0/24 109.74.242.0/24 109.74.243.0/24 109.74.244.0/24 109.74.246.0/24 109.74.247.0/24 109.74.248.0/24 109.74.249.0/24 109.74.250.0/24 109.74.251.0/24 109.74.252.0/24 109.74.255.0/24 176.12.104.0/24 176.12.105.0/24
The 25 largest of 39. The API and the database have all of them.
IPv6 prefixes
7 prefixes- 2a00:1c10:100::/40
- 2a00:1c10::/44
- 2a00:1c10:10::/44
- 2a00:1c10:30::/44
- 2a00:1c10:cd0::/44
- 2a00:1c10:fff0::/44
- 2a00:1c10:da2::/48
2a00:1c10:100::/40 2a00:1c10::/44 2a00:1c10:10::/44 2a00:1c10:30::/44 2a00:1c10:cd0::/44 2a00:1c10:fff0::/44 2a00:1c10:da2::/48
Query AS50300 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=AS50300&key=YOUR_API_KEY"Any address in its prefixes resolves to AS50300, with or without a key:
curl "https://api.ipapi.is/?q=185.14.164.1"