If you are here to manage a domain name (e.g. change DNS servers or contacts) and you have been given a "billing id" and billing password, you should go through the My-Account area.

The my-account area is the "prefered" management path, but older and more specific options are given below.

If you have a "domain management username", take the com/net/org link below. If you're the admin contact for a .CA domain, the .CA link below will allow you to have a userid/password mailed to you which will work at the same link. If you aren't sure which userid and password you have, check the "Passwords, why so many?" link at the support index.