Lookup of 52.21.2.18
IP address: 52.21.2.18
Address type: IPv4
Host or reverse DNS (rDNS): ec2-52-21-2-18.compute-1.amazonaws.com
Country: 
United States
52.21.2.18 does NOT belong to a private IP address block.
52.21.2.18 does NOT belong to a reserved IP address block.