AS20057 107.241.152.0/21 CIDR and IP Range Summary.ASN: 20057 - AT&T Mobility LLCHost Count: 2046Addressable IPs: 2048107.241.152.0/24107.241.153.0/24107.241.154.0/24107.241.155.0/24107.241.156.0/24107.241.157.0/24107.241.158.0/24107.241.159.0/24