Where Buy and Ceck Domain?

Where do you register / check domain?
If I want to see or check my domain because it can always visit whois.com see the available options, and to purchase lots with paypal or dollar menggukan I always use godaddy.com account, of which there are several options there namecheap.com can view search results available and can see the whois.

If your friends have different perceptions please comment below.