AS50300 Custodian DataCentres
AS50300 is operated by Custodian DataCentres and registered with RIPE NCC (GB) since 2009-12-16.
It announces 39 IPv4 and 8 IPv6 prefixes, 95% of them RPKI valid.
RIPE RIS sees 67 upstream and peer networks and 6 downstream networks next to it.
PeeringDB lists it as an NSP network at 3 internet exchanges and 13 facilities. Its peering policy is selective.
| Name | Custodian DataCentres |
|---|---|
| Registry (RIR) | RIPE NCC |
| Country | United Kingdom (GB) |
| Delegated on | 2009-12-16 |
| Network type | NSP, Europe |
| Peering policy | Selective |
| IRR as-set | AS-CUSTDC |
| Prefixes (IPv4 / IPv6) | 39 / 8 |
| RPKI valid | 95% (45 / 47) |
| Upstreams and peers | 67 |
| Downstream networks | 6 |
| Website | CustodianDC.com |
Routing health
- AS50300 announces 39 IPv4 and 8 IPv6 prefixes.
- 45 of 47 announced prefixes are RPKI valid.
- 2 announced prefixes are not covered by a ROA of AS50300 (they may have none, or another network’s).
- 67 upstreams and peers, 6 downstream networks seen.
For every check with the fix (IRR route objects, the RPKI state of each route, reverse DNS and the registration), run the full network report.
Announced prefixes 47
- 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
- 176.12.106.0/24
- 176.12.107.0/24
- 176.12.108.0/24
- 176.12.109.0/24
- 176.12.110.0/24
- 185.14.164.0/22
- 185.32.72.0/24
- 185.32.73.0/24
- 185.32.75.0/24
- 185.42.65.0/24
- 185.48.164.0/24
- 185.48.165.0/24
- 185.48.166.0/24
- 185.48.167.0/24
- 193.33.198.0/24
- 2a00:1c10:10::/44
- 2a00:1c10:20::/44
- 2a00:1c10:30::/44
- 2a00:1c10:100::/40
- 2a00:1c10::/44
- 2a00:1c10:cd0::/44
- 2a00:1c10:da2::/48
- 2a00:1c10:fff0::/44
Upstreams and peers 67
The networks RIPE RIS sees next to AS50300 in BGP paths, the most visible first.
Peering
Peering policy: Selective. Suggested max-prefix limits: 300 IPv4, 150 IPv6. PeeringDB record
| Exchange | Ports | Speed | Route server |
|---|---|---|---|
| AMS-IX | 1 | 10G | Yes |
| LINX LON1: Main | 1 | 20G | Yes |
| LONAP: LON0 | 1 | 10G | Yes |
| Facility | City | Country |
|---|---|---|
| 4D Gatwick (Crawley) | Crawley | GB |
| 4D Surrey | Byfleet | GB |
| Custodian CDC Dartford DA2 | Dartford | GB |
| Custodian CDC Maidstone 1 | Maidstone | GB |
| Digital Realty AMS3/5/7/8/10 - Amsterdam | Amsterdam | NL |
| Digital Realty London LHR20 | London | GB |
| Digital Realty London LHR21 (closed) | London | GB |
| Global Switch London North | London | GB |
| Level(3) London (Braham Street) | London | GB |
| Level(3) London (Goswell Road) | London | GB |
| Telehouse - London (Docklands East) | London | GB |
| Telehouse - London (Docklands North) | London | GB |
| Telehouse - London (Docklands West) | London | GB |
More about AS50300
Sources: RIR delegation data and PeeringDB (updated daily); routing from RIPEstat (RIPE NCC RIS and RPKI), refreshed daily. Routing data from 2026-11-12 17:44 UTC. The country is where the AS number was registered, not necessarily where the network operates.