AS1281 154.48.72.0/21 CIDR and IP Range Summary.ASN: 1281 - PSINet Inc.Host Count: 2046Addressable IPs: 2048154.48.72.0/24154.48.73.0/24154.48.74.0/24154.48.75.0/24154.48.76.0/24154.48.77.0/24154.48.78.0/24154.48.79.0/24