AS1281 154.39.16.0/21 CIDR and IP Range Summary.ASN: 1281 - PSINet Inc.Host Count: 2046Addressable IPs: 2048154.39.16.0/24154.39.17.0/24154.39.18.0/24154.39.19.0/24154.39.20.0/24154.39.21.0/24154.39.22.0/24154.39.23.0/24