AS23520 72.252.48.0/20 CIDR and IP Range Summary.ASN: 23520 - Columbus Networks USA Inc.Host Count: 4094Addressable IPs: 409672.252.48.0/2472.252.49.0/2472.252.50.0/2472.252.51.0/2472.252.52.0/2472.252.53.0/2472.252.54.0/2472.252.55.0/2472.252.56.0/2472.252.57.0/2472.252.58.0/2472.252.59.0/2472.252.60.0/2472.252.61.0/2472.252.62.0/2472.252.63.0/24