AS7018 12.131.16.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.131.16.0/2412.131.17.0/2412.131.18.0/2412.131.19.0/2412.131.20.0/2412.131.21.0/2412.131.22.0/2412.131.23.0/24