AS7018 121.91.240.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 2048121.91.240.0/24121.91.241.0/24121.91.242.0/24121.91.243.0/24121.91.244.0/24121.91.245.0/24121.91.246.0/24121.91.247.0/24