If you are searching for the default IP of your router then have a look at this guide: Find your router IP. With one of the described methods we guarantee that you will find the router IP for your router admin interface.
But if you search for a list of the most popular default IP addresses used by the different router brands then watch at the list below. These are the top 100 most used IPs collected from more than 10.000 router models and 2.000 router brands.