Nextiva uses hosted carriers to port in telephone numbers. We have inquired with all of our carriers, and essentially, it is because of the rate center (or prefix) this number falls into. We do not have a “footprint” in the geographical area and are not able to service these numbers. Unfortunately, there is nothing further we can do, as our providers explain that building routes and coverage to areas such as this is a lengthy process based on demand.
Alternatively, if you do not need this specific number(s), we can assign a new, similar number(s) under our service.