Carrier, area and validity:
how to label a result.
How to interpret carrier, region and validity claims without turning a range into a person.
Field note
Original carrier is not current carrier
Portability changes how an allocation record should be labeled.
Read note Field noteAn area code is not a map pin
Regional numbering is administrative geography, not live location.
Read note Field noteWhat “valid number” really means
A pattern can fit a plan without belonging to an active subscriber.
Read note