Interesting how LLLL.com and NNNN.com are all hand registered. But what about the remaining combinations, how long until all those are gone too?
If you combine them there are 27 letters and 10 numbers,
37 X 37 X 37 X37 = 1,874,161
We know that there are 531,441 LLLL and 10000 NNNN taken...