AS18563 64.254.16.0/21 CIDR and IP Range Summary.ASN: 18563 - CGI Inc.Host Count: 2046Addressable IPs: 204864.254.16.0/2464.254.17.0/2464.254.18.0/2464.254.19.0/2464.254.20.0/2464.254.21.0/2464.254.22.0/2464.254.23.0/24