AS13 147.216.136.0/21 CIDR and IP Range Summary.ASN: 13 - Headquarters USAISCHost Count: 2046Addressable IPs: 2048147.216.136.0/24147.216.137.0/24147.216.138.0/24147.216.139.0/24147.216.140.0/24147.216.141.0/24147.216.142.0/24147.216.143.0/24