AS7018 172.10.0.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 2048172.10.0.0/24172.10.1.0/24172.10.2.0/24172.10.3.0/24172.10.4.0/24172.10.5.0/24172.10.6.0/24172.10.7.0/24