AS1281 154.63.144.0/20 CIDR and IP Range Summary.ASN: 1281 - PSINet Inc.Host Count: 4094Addressable IPs: 4096154.63.144.0/24154.63.145.0/24154.63.146.0/24154.63.147.0/24154.63.148.0/24154.63.149.0/24154.63.150.0/24154.63.151.0/24154.63.152.0/24154.63.153.0/24154.63.154.0/24154.63.155.0/24154.63.156.0/24154.63.157.0/24154.63.158.0/24154.63.159.0/24