The government has an interactive map that will show you who holds spectrum in any given area, but it's worse than useless. It's here
if you want to take a look. Click on AWS to see the AWS map.
The final results in tables are here
I can tell you that Wind has AWS spectrum licenses covering all of Canada except Southern Quebec. They 10 MHz of AWS spectrum everywhere but Southern Ontario and the Yukon, where they have 20 MHz, and Northern Ontario and Northern Quebec, where they have 5 MHz.
They also have G-block PCS spectrum (like Public Mobile) in Northern Quebec (in addition to the 5 MHz of AWS), and nothing at all in Southern Quebec.
They're planning on being national everywhere but Quebec, because Videotron ridiculously overpaid to keep everyone else out of Quebec. Next year they plan on launching in Victoria, Winnipeg, Saskatoon, and Halifax. They're building at a much faster rate now because they were previously held up by the court case.