AS7018 64.172.128.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204864.172.128.0/2464.172.129.0/2464.172.130.0/2464.172.131.0/2464.172.132.0/2464.172.133.0/2464.172.134.0/2464.172.135.0/24