I see that Google Voice will no longer allow call forwarding to the 403 area code (my Freephoneline number). I got a notice last month that I would have to re-verify the number by May 15, and Google won't let me do it, reports it as an out-of-country number. The existing forwarding still works, but only for another week.
They plugged it for new sign-ups, but left it in place for those of us
who managed to set it up originally. I could forward GV to the
Freephoneline 403 number, and then forward it anywhere else in Canada
Is your Canadian number being dropped? I have had the google voice
number dropped in one of my accounts due to inactivity. The rationale
provided was that they want to free up dormant numbers for others to
use. I just had to add one back. Ever since losing the number, I
regularly use hangouts dialer to make a call to reset the clock. As for
my own Canadian numbers, I am not aware that they are threatened in any
way. They are my numbers and dormancy doesn't affect google. BTW, the
Canadian numbers I have registered are 416 and 647 area code.