AS13 143.194.136.0/21 CIDR and IP Range Summary.ASN: 13 - Headquarters USAISCHost Count: 2046Addressable IPs: 2048143.194.136.0/24143.194.137.0/24143.194.138.0/24143.194.139.0/24143.194.140.0/24143.194.141.0/24143.194.142.0/24143.194.143.0/24