You asked for our phone book to expand, and we listened to you! Our award-winning and highly-rated iPhone reverse phone lookup app is now available in all US territories, Canada, and many Caribbean nations.
Our online community phone book now features all phone numbers that are part of the North American Numbering Plan, or NANP for short.
What Is the North American Numbering Plan?
The North American Numbering Plan was first created in the 1940s by Bell Telephone Company and other Bell System companies. Its purpose was to unify the various diverse numbering plans that had been created since the dawn of the telephone at the beginning of the 20th century.
In the 1980s when the Bell System broke up due to an antitrust lawsuit started in 1974 by the United States Department of Justice. Since this break up the North American Numbering Plan (NANP) in the United States has been administrated by the Federal Communications Commission (FCC).
Members of the North American Numbering Plan
The following territories and countries are members in the North American Numbering Plan. If you're from one of these countries click the link in the table to download our caller ID app.
Dialing Phone Numbers in the North American Numbering Plan
All phone numbers in the North American Numbering Plan begin with a +1, then each region is divided into numbering plan areas (NPAs), commonly referred to as area codes. The 3-digit area code prefix is always followed by another 3-digit central office code, and finally with a 4-digit code that is unique to each phone line.
The 3-digit NPA (area) code can be any digit from 2 to 9 for the first digit and then any number 0 to 9 for the 2nd and 3rd digits. Traditionally, NPAs that end in 11 are reserved for services, like 911 being for emergencies and 411 being for information.
Central office codes, which are the digits that follow the area code can be any digit from 2 to 9 for the first digit and any number 0 to 9 for the next 2-digits.
The final 4-digits of a phone line can be any combination of numbers 0 to 9.
The above rules are helpful to keep in mind especially when receiving calls from unknown numbers. Our phone book still supports only valid NANP phone numbers meaning that if you get a call from a +1 876-014-6656 it won't appear in our phone book because the 4th digit is not valid per NANP numbering regulations.
Using CallerSmart to Identify Unknown Calls and Potential Scams
You can look up phone numbers in our app, or on our website, to see where a phone number's from, who the phone number belongs to, carrier information, suspicious activity related to the phone number, and more in our phone book.
Once you have our app downloaded, simply copy a phone number and open the app. We'll automatically search the phone number you copied and display whatever free results we have available. At no risk, you can also purchase a Premium Lookup Report to see more detailed information, including social media profiles associated with the phone number.