AS1239 63.172.72.0/21 CIDR and IP Range Summary.ASN: 1239 - SprintHost Count: 2046Addressable IPs: 204863.172.72.0/2463.172.73.0/2463.172.74.0/2463.172.75.0/2463.172.76.0/2463.172.77.0/2463.172.78.0/2463.172.79.0/24