AS7018 12.153.248.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.153.248.0/2412.153.249.0/2412.153.250.0/2412.153.251.0/2412.153.252.0/2412.153.253.0/2412.153.254.0/2412.153.255.0/24