AS7018 12.31.240.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409612.31.240.0/2412.31.241.0/2412.31.242.0/2412.31.243.0/2412.31.244.0/2412.31.245.0/2412.31.246.0/2412.31.247.0/2412.31.248.0/2412.31.249.0/2412.31.250.0/2412.31.251.0/2412.31.252.0/2412.31.253.0/2412.31.254.0/2412.31.255.0/24