Determine whether a phone number is wireless or a landline - in real
time. Even if the phone number has been ported between service
providers, Phone Verification will return the latest information.
Phone Verification validates the ten digits of a U.S. telephone number
and returns carrier information as well as the Location Routing Number
(LRN) for telephone numbers administered by the North American Numbering
LRN is a unique 10-digit number that represents a telephone switch
through which multiple phone numbers are routed. The LRN enables Local
Number Portability (LNP), which allows phone numbers to be ported to
The benefits of using the Phone Verification API include:
Phone Number Verification Information.
The Phone Verification LRN service covers the U.S. and Canada. Please
note that toll-free numbers do not return LRN information.