US phone number formatter

Which format does the form in front of you want?

628 555 0113 is an example. The 555-01xx range is reserved for examples and belongs to no one.

What each part of a US number means

• +1 is the country code. The United States shares it with Canada and most Caribbean countries, which is why a Canadian number looks the same.
• 628 is the area code. It starts with a digit from 2 to 9 and never ends in 11, because numbers like 411 and 911 are services.
• 555 is the exchange. It also starts with a digit from 2 to 9.
• 0113 is the line number, any four digits.

That makes ten digits after the +1, always. A “US number” with nine or twelve digits has a typo or a doubled country code, and the tool above tells you which rule it breaks.

Entering a US number from outside the United States

If you’re filling in a form abroad, check the country dropdown first: sites often preselect your own country from your location, and a US number entered under +44 or +91 is simply a wrong number. Set the country to United States, then type the ten digits.

To dial a US number from a phone abroad, the plus sign does the work: +1 628 555 0113 dials correctly from any mobile in any country. The “00” or “011” prefixes you may have learned are what the plus stands for locally.

If you need a US number of your own to receive a verification text, that is what a number from us is: it arrives formatted both ways, with a button for each.

Questions people ask

Do I include the 1 when typing a US phone number?

Only when the form doesn’t already supply it. If you see +1 or a US flag beside the box, type the ten digits. If there is a single box and no country shown, type +1 and then the ten digits with no spaces.

What is E.164 format for a US number?

A plus sign, the country code 1, and the ten-digit number with no spaces or punctuation: +16285550113. It is the international standard format that APIs and phone systems use, and it is at most 15 digits long for any country.

Why does a form say my US phone number is invalid?

The usual causes are a doubled country code (+1 typed into a box that already adds it), the wrong country selected in a dropdown, or brackets and dashes in a box that accepts digits only. Less often, the area code or the middle three digits start with 0 or 1, which no US number does.

How many digits is a US phone number?

Ten: a three-digit area code and a seven-digit number. With the country code it is eleven digits, written +1 followed by the ten.

Does this tool tell me whether a number is real or who owns it?

No. It checks that a number follows the rules of US numbering and rewrites it. It does not look the number up, and nothing you type is sent to a server.