Lookup of 18.138.4.5
IP address: 18.138.4.5
Address type: IPv4
Host or reverse DNS (rDNS): ec2-18-138-4-5.ap-southeast-1.compute.amazonaws.com
Country: 
Singapore
18.138.4.5 does NOT belong to a private IP address block.
18.138.4.5 does NOT belong to a reserved IP address block.