I call my Owner "Master" most of the time when I am speaking to him when we are not among the uninitiated, sometimes he doesn't allow this or changes what I am to call him, on rare occasions as a reward he has even let me use his given name.

I call most other dominants Sir by default when allowed to speak directly too them unless they have specified otherwise or I know they are part of a tradition that makes use of another title, such as my Owner's friends (All lifestyle Goreans, who also get called "Master").

As for what I am called by others...lol..well that can vary quite a bit depending on the whim of those who hold dominion over me at the time prefer.