Tollfree numbers in Canada (800, 866) don't work

Tollfree numbers in Canada (800, 866) don’t work. I invariably get the “Calling is temporarily unavailable” answer. However all numbers are valid as they work OK on my landline. I know, I get no-charge long distance across Canada, but still… :astonished:

Many toll free numbers are only good from certain areas. With the VOIP, it may look like it is coming from out of the allowed calling area.