Why Is a Phone Number 10-Digits?

A phone number is similar to a social security number in that both can identify U.S. citizens. This is because the United States is located within the North American Numbering Plan system, which uses ten digits per phone number.

There are lots of other numbering plans in the world and each plan is different in its pattern of numbers. Unlike our closed system here in the U.S., an open system has more or less than ten digits.

Despite all the advances in telecommunication-related devices (landlines to super smart phones), a phone number is still needed to call someone, or for others to call you. Just like Morse code, each number represents a pattern. For example, “three, two, three” looks like this: “••• – •• – •••”.

Here in the U.S., there are three parts to a ten-digit phone number – area code, prefix, and house (station) number.

The area code and prefix are the most important parts of your phone number. Think of it as: area code = area of North America, prefix = the city, the last four digits = your station (i.e. home).

Make sense? If you have any questions, just call us – 866-965-PARK.