AS7018 12.40.240.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409612.40.240.0/2412.40.241.0/2412.40.242.0/2412.40.243.0/2412.40.244.0/2412.40.245.0/2412.40.246.0/2412.40.247.0/2412.40.248.0/2412.40.249.0/2412.40.250.0/2412.40.251.0/2412.40.252.0/2412.40.253.0/2412.40.254.0/2412.40.255.0/24