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| CIDR range | Maintainer | Description | Source |
|---|---|---|---|
| 23.236.0.0/20 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 63.170.68.0/23 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 63.175.156.0/22 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 64.210.40.0/21 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 65.48.128.0/17 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 65.166.240.0/21 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 65.172.24.0/22 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 69.73.192.0/18 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 72.22.128.0/19 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 72.51.64.0/18 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 104.153.128.0/21 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 104.200.96.0/20 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 162.220.136.0/21 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 162.246.104.0/21 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 192.214.112.0/20 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 192.235.48.0/20 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 196.1.160.0/20 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 198.246.229.0/24 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 198.246.230.0/24 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 199.38.192.0/21 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 199.254.104.0/21 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 204.16.112.0/24 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 204.212.240.0/21 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 205.214.192.0/19 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 205.217.244.0/24 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 205.244.148.0/22 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 206.231.120.0/21 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 208.0.96.0/21 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 209.59.91.0/24 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 216.110.96.0/19 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 2600:8400::/28 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |