AS17229 63.240.144.0/21 CIDR and IP Range Summary.ASN: 17229 - AT&T Enhanced Network ServicesHost Count: 2046Addressable IPs: 204863.240.144.0/2463.240.145.0/2463.240.146.0/2463.240.147.0/2463.240.148.0/2463.240.149.0/2463.240.150.0/2463.240.151.0/24