Detailed information about 63.240.216.0/21 ASN 17231 - AT&T Enhanced Network Services Number of IPs: 2048 Number of Addressable Hosts: 2046 IP Subnets in 63.240.216.0/2163.240.216.0/2463.240.217.0/2463.240.218.0/2463.240.219.0/2463.240.220.0/2463.240.221.0/2463.240.222.0/2463.240.223.0/24