AS7018 74.172.192.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409674.172.192.0/2474.172.193.0/2474.172.194.0/2474.172.195.0/2474.172.196.0/2474.172.197.0/2474.172.198.0/2474.172.199.0/2474.172.200.0/2474.172.201.0/2474.172.202.0/2474.172.203.0/2474.172.204.0/2474.172.205.0/2474.172.206.0/2474.172.207.0/24