AS1281 154.54.240.0/21 CIDR and IP Range Summary.ASN: 1281 - PSINet Inc.Host Count: 2046Addressable IPs: 2048154.54.240.0/24154.54.241.0/24154.54.242.0/24154.54.243.0/24154.54.244.0/24154.54.245.0/24154.54.246.0/24154.54.247.0/24