AS7018 12.17.16.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409612.17.16.0/2412.17.17.0/2412.17.18.0/2412.17.19.0/2412.17.20.0/2412.17.21.0/2412.17.22.0/2412.17.23.0/2412.17.24.0/2412.17.25.0/2412.17.26.0/2412.17.27.0/2412.17.28.0/2412.17.29.0/2412.17.30.0/2412.17.31.0/24