Keep in mind not every company has a license under their own name. Often with smaller companies radios & repeater space are leased from rental shops so these agencies can be a bit harder to nail down.
You can do site-specific searches (yes, for Canada) by visiting maprad.io
which features a nice proximity search where you can input GPS coordinates of a specific location so you can see licenses in the area.
Again this is only good if a site license exists under the company's name and won't do you any good if X company leases from Y rental shop or if common & itinerant business frequencies are utilized. All of this is what makes the hobby so fun.