AS7018 68.21.128.0/18 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 16382Addressable IPs: 1638468.21.128.0/2468.21.129.0/2468.21.130.0/2468.21.131.0/2468.21.132.0/2468.21.133.0/2468.21.134.0/2468.21.135.0/2468.21.136.0/2468.21.137.0/2468.21.138.0/2468.21.139.0/2468.21.140.0/2468.21.141.0/2468.21.142.0/2468.21.143.0/2468.21.144.0/2468.21.145.0/2468.21.146.0/2468.21.147.0/2468.21.148.0/2468.21.149.0/2468.21.150.0/2468.21.151.0/2468.21.152.0/2468.21.153.0/2468.21.154.0/2468.21.155.0/2468.21.156.0/2468.21.157.0/2468.21.158.0/2468.21.159.0/2468.21.160.0/2468.21.161.0/2468.21.162.0/2468.21.163.0/2468.21.164.0/2468.21.165.0/2468.21.166.0/2468.21.167.0/2468.21.168.0/2468.21.169.0/2468.21.170.0/2468.21.171.0/2468.21.172.0/2468.21.173.0/2468.21.174.0/2468.21.175.0/2468.21.176.0/2468.21.177.0/2468.21.178.0/2468.21.179.0/2468.21.180.0/2468.21.181.0/2468.21.182.0/2468.21.183.0/2468.21.184.0/2468.21.185.0/2468.21.186.0/2468.21.187.0/2468.21.188.0/2468.21.189.0/2468.21.190.0/2468.21.191.0/24