AS1281 154.41.56.0/21 CIDR and IP Range Summary.ASN: 1281 - PSINet Inc.Host Count: 2046Addressable IPs: 2048154.41.56.0/24154.41.57.0/24154.41.58.0/24154.41.59.0/24154.41.60.0/24154.41.61.0/24154.41.62.0/24154.41.63.0/24