AS7018 12.15.16.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.15.16.0/2412.15.17.0/2412.15.18.0/2412.15.19.0/2412.15.20.0/2412.15.21.0/2412.15.22.0/2412.15.23.0/24