AS20057 166.173.224.0/20 CIDR and IP Range Summary.ASN: 20057 - AT&T Mobility LLCHost Count: 4094Addressable IPs: 4096166.173.224.0/24166.173.225.0/24166.173.226.0/24166.173.227.0/24166.173.228.0/24166.173.229.0/24166.173.230.0/24166.173.231.0/24166.173.232.0/24166.173.233.0/24166.173.234.0/24166.173.235.0/24166.173.236.0/24166.173.237.0/24166.173.238.0/24166.173.239.0/24