AS7018 12.31.152.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.31.152.0/2412.31.153.0/2412.31.154.0/2412.31.155.0/2412.31.156.0/2412.31.157.0/2412.31.158.0/2412.31.159.0/24