No, they are all randomly generated by the owner of the site.

But you CAN open a table that isn't showing on the list. Just go to the month archives in the leaderboard (http://kdice.com/monthStats) and pick someone on that list. Then, go to kdice.com/#thatperson. Voila, new table :)
Top 3 are 5k tables
4-25 are 2k tables
26-50 are 500
50-75 are 100
75-100 are 0s.
Also, if you know someone won a tourney last month then they'll have a 0 table (provided they weren't top 75, in which case they'll have the higher level table). You can look through the tourney archives for these people (http://kdice.com/tournamentHistory), but their tables are usually pretty bad- lots of holes, or bottlenecks, or very small.

Chloe that is false, as my alt won the nightly and does not have a table :(

won the nightly in november? 'cause it only does from the previous month

Yup I won a Nightly at the end of november :)
Nov 25, 10 1st 4,200

hmmm... that's odd. I dunno then. I've never been top 100 but have had at least 4 tables- when I asked about it, that was the explanation I was given.

other zero tables are usually top100+ players but you can't acces their names as easy as top 100.

the months I actually played some (ie months that have >5k points) I had tables but wasn't ever really close to top 100. I mean I ended most months hovering around 6k, but I'd have a zero table anyway.

and by 5k and 6k I totally meant 1k and 2k and up haha.