AS1 204.163.136.0/21 CIDR and IP Range Summary.ASN: 1 - Level 3 Parent LLCHost Count: 2046Addressable IPs: 2048204.163.136.0/24204.163.137.0/24204.163.138.0/24204.163.139.0/24204.163.140.0/24204.163.141.0/24204.163.142.0/24204.163.143.0/24