Thread:Spencerz/@comment-4651179-20121227185919/@comment-1713281-20121227233241

It's a series of pages called Name to Number. The page you use depends on which reality you want to edit, and is determined by how many digits are in the reality. You mentioned wanting to change Earth-199999, which has 6 digits, so you would edit Template:Number to Name/6. If you want to change the Ultimate universe. which is Earth-1610, you'd edit Template:Number to Name/4, and so on. Just make sure to double check your edits before you publish, cause if you miss a bracket or something, it'll break the template for all the realities on that page.

If a reality isn't listed (which can be likely), just add it in to the right page with the same format as the others.

I went ahead and listed them all for ease of access:
 * Template:Number to Name/1
 * Template:Number to Name/2
 * Template:Number to Name/3
 * Template:Number to Name/4
 * Template:Number to Name/5
 * Template:Number to Name/6 (TRNs are housed at the bottom of this one)
 * Template:Number to Name/7 (This one appears to hold everything above 6 digits, and random stuff, but seems to be pretty outdated. I'll likely house clean it later)