Lookup of 100.21.26.187
IP address: 100.21.26.187
Address type: IPv4
Host or reverse DNS (rDNS): ec2-100-21-26-187.us-west-2.compute.amazonaws.com
Country: 
United States
100.21.26.187 does NOT belong to a private IP address block.
100.21.26.187 does NOT belong to a reserved IP address block.