AS20057 166.170.80.0/21 CIDR and IP Range Summary.ASN: 20057 - AT&T Mobility LLCHost Count: 2046Addressable IPs: 2048166.170.80.0/24166.170.81.0/24166.170.82.0/24166.170.83.0/24166.170.84.0/24166.170.85.0/24166.170.86.0/24166.170.87.0/24