AS1281 154.19.56.0/21 CIDR and IP Range Summary.ASN: 1281 - PSINet Inc.Host Count: 2046Addressable IPs: 2048154.19.56.0/24154.19.57.0/24154.19.58.0/24154.19.59.0/24154.19.60.0/24154.19.61.0/24154.19.62.0/24154.19.63.0/24