AS7018 12.4.16.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.4.16.0/2412.4.17.0/2412.4.18.0/2412.4.19.0/2412.4.20.0/2412.4.21.0/2412.4.22.0/2412.4.23.0/24