What wireless router am I on?

[rgG]

An AE ( I assume you mean Airport Express) can extend the range (WDS mode) of another Apple router, like an Airport Extreme, but it will not extend the range of just any other router.

Question: Can AirPort Express wirelessly extend ("repeat" or "rebroadcast" ) the network of a third-party access point?

Answer: No. But it can wirelessly extend the range of a WDS network that is being hosted by an AirPort Extreme Base Station or another AirPort Express.

http://support.apple.com/kb/HT1515?viewlocale=en_US#1