Lookup of 100.28.19.138
IP address: 100.28.19.138
Address type: IPv4
Host or reverse DNS (rDNS): ec2-100-28-19-138.compute-1.amazonaws.com
Country: 
United States
100.28.19.138 does NOT belong to a private IP address block.
100.28.19.138 does NOT belong to a reserved IP address block.