A method for testing a Local Number Portability (LNP) ported telephone number is provided according to the invention. The method includes in a first switch generating a LNP test telephone call to a second switch. The LNP test telephone call is targeted to the LNP-ported telephone number associated with the first switch. The method further includes indicating that the LNP-ported telephone number is being correctly routed in the second switch if the first switch receives the LNP test telephone call back from the second switch. The method further includes indicating that the LNP-ported telephone number is being incorrectly routed in the second switch if the first switch does not receive the LNP test telephone call back from the second switch.