AS20057 155.166.232.0/21 CIDR and IP Range Summary.ASN: 20057 - AT&T Mobility LLCHost Count: 2046Addressable IPs: 2048155.166.232.0/24155.166.233.0/24155.166.234.0/24155.166.235.0/24155.166.236.0/24155.166.237.0/24155.166.238.0/24155.166.239.0/24