AS1281 154.45.56.0/21 CIDR and IP Range Summary.ASN: 1281 - PSINet Inc.Host Count: 2046Addressable IPs: 2048154.45.56.0/24154.45.57.0/24154.45.58.0/24154.45.59.0/24154.45.60.0/24154.45.61.0/24154.45.62.0/24154.45.63.0/24