AS1281 154.52.56.0/21 CIDR and IP Range Summary.ASN: 1281 - PSINet Inc.Host Count: 2046Addressable IPs: 2048154.52.56.0/24154.52.57.0/24154.52.58.0/24154.52.59.0/24154.52.60.0/24154.52.61.0/24154.52.62.0/24154.52.63.0/24