AS1281 154.18.0.0/21 CIDR and IP Range Summary.ASN: 1281 - PSINet Inc.Host Count: 2046Addressable IPs: 2048154.18.0.0/24154.18.1.0/24154.18.2.0/24154.18.3.0/24154.18.4.0/24154.18.5.0/24154.18.6.0/24154.18.7.0/24