AS1281 154.39.40.0/21 CIDR and IP Range Summary.ASN: 1281 - PSINet Inc.Host Count: 2046Addressable IPs: 2048154.39.40.0/24154.39.41.0/24154.39.42.0/24154.39.43.0/24154.39.44.0/24154.39.45.0/24154.39.46.0/24154.39.47.0/24