AS1281 154.48.136.0/21 CIDR and IP Range Summary.ASN: 1281 - PSINet Inc.Host Count: 2046Addressable IPs: 2048154.48.136.0/24154.48.137.0/24154.48.138.0/24154.48.139.0/24154.48.140.0/24154.48.141.0/24154.48.142.0/24154.48.143.0/24