Thread:Undoniel/@comment-25759548-20141126143104/@comment-3406131-20141126143913

"Earthes" are in fact realities.
 * Earth-1218 is our Earth.
 * Earth-616 is the mainstream comics reality.
 * Earth-1610 is the mainstream Ultimate comics reality.
 * Earth-199999 is the reality of the Marvel Cinematic Realities.

Earthes with as designation "TRN" are Earthes who haven't been given any official designations. TRN stands for "Temporary Reality Number".
 * Earth-TRN123 is the current cartoons reality.

Hope it was clear.