AS5400 80.255.160.0/20 CIDR and IP Range Summary.ASN: 5400 - British Telecommunications PLCHost Count: 4094Addressable IPs: 409680.255.160.0/2480.255.161.0/2480.255.162.0/2480.255.163.0/2480.255.164.0/2480.255.165.0/2480.255.166.0/2480.255.167.0/2480.255.168.0/2480.255.169.0/2480.255.170.0/2480.255.171.0/2480.255.172.0/2480.255.173.0/2480.255.174.0/2480.255.175.0/24