If your current number is from Alberta, B.C., or Ontario, you can change your number to one from any province. If your current number is from another province, you must choose a number from that same province.https://www.telus.com/en/on/support/article/optional-services-fees
Some Koodo employees were claiming that this was a bug (and that they were going to get it fixed a few years ago. If you didn't know, nothing gets fixed at Koodo.) There is also always a disagreement when someone here asks to change phone numbers from one province to another province. This should put an end to that.