AS20057 166.184.80.0/21 CIDR and IP Range Summary.ASN: 20057 - AT&T Mobility LLCHost Count: 2046Addressable IPs: 2048166.184.80.0/24166.184.81.0/24166.184.82.0/24166.184.83.0/24166.184.84.0/24166.184.85.0/24166.184.86.0/24166.184.87.0/24