AS7018 12.156.16.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409612.156.16.0/2412.156.17.0/2412.156.18.0/2412.156.19.0/2412.156.20.0/2412.156.21.0/2412.156.22.0/2412.156.23.0/2412.156.24.0/2412.156.25.0/2412.156.26.0/2412.156.27.0/2412.156.28.0/2412.156.29.0/2412.156.30.0/2412.156.31.0/24