You can search 410-411 as suggested, and/or program 410.3875, 410.4625,
410.6375 and 410.7875 to see what pops up. Also try 151.730 which is listed
in TAFL for Ontario.
Some of the 410 frequencies above are used for transit in Ottawa.
As an aside, CBSA was listed in Ottawa as analog on the EDACS system,
but no longer in TAFL; suspect they are digital (ProVoice) if on there at all,
but hard to tell; new digital TGs show up but no real way to know who they
are.
Dave