AS23520 63.245.48.0/21 CIDR and IP Range Summary.ASN: 23520 - Columbus Networks USA Inc.Host Count: 2046Addressable IPs: 204863.245.48.0/2463.245.49.0/2463.245.50.0/2463.245.51.0/2463.245.52.0/2463.245.53.0/2463.245.54.0/2463.245.55.0/24