Refurbished Serial Numbers for 4S?

[Rocko]

Does anyone know the serial numbers for the refurbished 4S's? I know the older refurbed phones started with 8K or something like this.

 

[Skull One]

Are there any 4S refurbs out yet?????

 

[Rocko]

That is what I am trying to ascertain. In the past from what I have read, 30 days or so the refurbed or re-manufactured units start showing up from Apple as replacements.