Summary
| Country |
 United Kingdom
|
| Domain | retn.net |
| Size | 4,096 |
| Registry | RIPE NCC |
| Network Name | OPTRON |
Whois
CIDR IP address subranges within 217.28.48.0/20 subnet
- 217.28.48.0/24
- 217.28.49.0/24
- 217.28.50.0/24
- 217.28.51.0/24
- 217.28.52.0/24
- 217.28.53.0/24
- 217.28.54.0/24
- 217.28.55.0/24
- 217.28.56.0/24
- 217.28.57.0/24
- 217.28.58.0/24
- 217.28.59.0/24
- 217.28.60.0/24
- 217.28.61.0/24
- 217.28.62.0/24
- 217.28.63.0/24