AS7018 12.221.152.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.221.152.0/2412.221.153.0/2412.221.154.0/2412.221.155.0/2412.221.156.0/2412.221.157.0/2412.221.158.0/2412.221.159.0/24