I think what this guy is asking is how to identify the router wich is spreeding de wifi signal, isn't it?
That is the easiest part. The mac of the router wich you can easily find with airodump will give you the information you need.
You can use for example this webpage:
http://coffer.com/mac_find/there you will know the vendor, for knowing the exact modle is a bit more dificult, there is a list over the internet with that information, just google for that.
