AS20057 166.203.32.0/20 CIDR and IP Range Summary.ASN: 20057 - AT&T Mobility LLCHost Count: 4094Addressable IPs: 4096166.203.32.0/24166.203.33.0/24166.203.34.0/24166.203.35.0/24166.203.36.0/24166.203.37.0/24166.203.38.0/24166.203.39.0/24166.203.40.0/24166.203.41.0/24166.203.42.0/24166.203.43.0/24166.203.44.0/24166.203.45.0/24166.203.46.0/24166.203.47.0/24