NANPA Lookup Tool

by phone #
Phone number:
(ex: 1 (201) 555-1212)

What it does: US Phone numbers are doled out by the North American Numbering Plan Association (NANPA) in blocks. Blocks typically span an area code + exchange representing 10,000 phone numbers (e.g. 201-555-0000 through 201-555-9999). This information is public. Given a phone number, the script on this page queries the NANPA database, returning useful information about that number such as the carrier and its locality. Database updated 8/26/2003.