AS7018 12.199.16.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.199.16.0/2412.199.17.0/2412.199.18.0/2412.199.19.0/2412.199.20.0/2412.199.21.0/2412.199.22.0/2412.199.23.0/24