How to Use the Phone Number International Format Converter
When you're giving your number to someone overseas or entering it into an international service, the local format you're used to at home isn't what the rest of the world expects. International format follows the ITU-T E.164 standard: it puts the country code first (+1 for the US, +44 for the UK, and so on) and drops any domestic trunk prefix, like the leading 0 many countries use, since that prefix has no meaning once the country code is already specified. A US number like (555) 123-4567 becomes +1 (555) 123-4567, while a UK mobile like 07911 123456 becomes +44 7911 123456.
This converter strips out any dashes, spaces, or parentheses, checks the digit count against the selected country's format, and reassembles the number using each country's typical spacing convention. The United States is set as the default since it's the format most visitors need, but you can switch the country selector to the United Kingdom, Australia, Japan, or South Korea to convert numbers from those countries instead. Each country has its own dialing pattern, so results are grouped differently depending on which one you pick.
This is handy when signing up for an international shopping site, entering a recipient's number for cross-border shipping, sharing your number with someone abroad, or saving a contact on your phone in a format that works no matter where the call is placed from. To actually dial internationally, follow your own country's exit code (011 from the US, or simply + from a smartphone), then the country code and number exactly as shown here.
Frequently Asked Questions
The country code already identifies which country you're dialing into, so the leading trunk prefix (0) used only for domestic calls is dropped in international format. For example, a UK mobile number 07911 123456 becomes +44 7911 123456.
Dial your country's international access code (011 in the US, 00 in many other countries, or simply + on a smartphone), followed by the country code and the number shown here without its leading 0. Saving contacts in the full +country-code format makes this automatic.