AS20057 166.170.0.0/20 CIDR and IP Range Summary.ASN: 20057 - AT&T Mobility LLCHost Count: 4094Addressable IPs: 4096166.170.0.0/24166.170.1.0/24166.170.2.0/24166.170.3.0/24166.170.4.0/24166.170.5.0/24166.170.6.0/24166.170.7.0/24166.170.8.0/24166.170.9.0/24166.170.10.0/24166.170.11.0/24166.170.12.0/24166.170.13.0/24166.170.14.0/24166.170.15.0/24