NPA NXX History Lookup

NPA NXX Telephone Area Code and Prefix Cummulative Changes

This lookup uses our base historical information to show changes that have occured to basic NPA NXX block data from April 2004 to the present at the thousands block level.

Enter a 6-digit area code and prefix (NPA NXX) combination or a 10-digit telephone number.


NPANXXBlockChangeDateBlock TypeSwitchOCNLATARate CenterStatePortable