AS7018 74.237.240.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409674.237.240.0/2474.237.241.0/2474.237.242.0/2474.237.243.0/2474.237.244.0/2474.237.245.0/2474.237.246.0/2474.237.247.0/2474.237.248.0/2474.237.249.0/2474.237.250.0/2474.237.251.0/2474.237.252.0/2474.237.253.0/2474.237.254.0/2474.237.255.0/24