AS1281 154.51.240.0/20 CIDR and IP Range Summary.ASN: 1281 - PSINet Inc.Host Count: 4094Addressable IPs: 4096154.51.240.0/24154.51.241.0/24154.51.242.0/24154.51.243.0/24154.51.244.0/24154.51.245.0/24154.51.246.0/24154.51.247.0/24154.51.248.0/24154.51.249.0/24154.51.250.0/24154.51.251.0/24154.51.252.0/24154.51.253.0/24154.51.254.0/24154.51.255.0/24