AS7018 121.127.56.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 2048121.127.56.0/24121.127.57.0/24121.127.58.0/24121.127.59.0/24121.127.60.0/24121.127.61.0/24121.127.62.0/24121.127.63.0/24