The reverse DNS is the exact name of your connection associated with your IP address.
Each time you connect, your ISP automatically provides you with an IP address. Thanks to the reverse DNS, you will be able to get the exact name of this IP also called host).
My IP Tools gives you the possibility to know the host associated with your IP address by entering the IP address below.
This service is free and you can use it as many times as you like.
Your IP address is: 18.104.22.168 and its reverse DNS is : ec2-54-80-60-91.compute-1.amazonaws.com