AS1281 154.50.144.0/20 CIDR and IP Range Summary.ASN: 1281 - PSINet Inc.Host Count: 4094Addressable IPs: 4096154.50.144.0/24154.50.145.0/24154.50.146.0/24154.50.147.0/24154.50.148.0/24154.50.149.0/24154.50.150.0/24154.50.151.0/24154.50.152.0/24154.50.153.0/24154.50.154.0/24154.50.155.0/24154.50.156.0/24154.50.157.0/24154.50.158.0/24154.50.159.0/24