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| CIDR range | Maintainer | Description | Source |
|---|---|---|---|
| 23.249.128.0/20 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 23.249.130.0/24 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 63.221.97.0/24 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 63.245.89.0/24 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 67.230.87.0/24 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 67.230.94.0/24 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 67.230.116.0/24 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 67.230.118.0/24 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 69.79.111.0/24 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 104.254.168.0/21 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |
| 199.71.93.0/24 | MAINT-AS23520 | COLUMBUS NETWORKS TRANSIT CUSTOMERS | RADB |