Lookup of 107.21.23.5
IP address: 107.21.23.5
Address type: IPv4
Host or reverse DNS (rDNS): ec2-107-21-23-5.compute-1.amazonaws.com
Country: 
United States
107.21.23.5 does NOT belong to a private IP address block.
107.21.23.5 does NOT belong to a reserved IP address block.