How to Convert International Phone Numbers to What You Dial
To dial an international number, dial your country's exit code, then the country code, then the number without its leading 0. From the US, +44 20 7946 0958 becomes 011 44 20 7946 0958. For a whole list or CSV, the international dialing converter writes the digits to dial for every row once you pick the country you are calling from.
The exit code is 011 from the US and Canada, 00 from most of Europe and 0011 from Australia.
Why a simple prefix does not work
An Excel formula such as ="011"&A2 adds the exit code but leaves the trunk 0 in place and adds 011 even for calls inside +1. The tool's own comparison shows where it breaks: Italy keeps its 0, Argentina's mobiles add a 9 after the country code, and calls between +1 countries need only 1 and the ten digits. The background on the + form is in E.164 phone number format and international phone number format.
The by-hand way
- Look up the exit code of the country you call from.
- Write the country code of the destination.
- Drop the trunk 0 unless the country keeps it, as Italy does.
- Join the three parts.
That is manageable for one number and error-prone for a list with a dozen countries.
Step 1: pick the country you call from
Its exit code shows straight away.
Step 2: set a default country and add the numbers
Choose a default country for numbers written without a + code, then paste numbers or upload a CSV.
Step 3: download what to dial
Each number gets the digits to dial from your country, the + form for a mobile and how it is written inside its own country. Download the CSV with your other columns kept.
What this check cannot do
- It formats valid numbers only; an invalid number gets no dial string.
- Some countries have several exit codes for different carriers, and this uses the default in the numbering-plan data.
- Dialling digits do not prove the line works: it may be disconnected or ported.
- Up to 500 rows a run without an account and 25,000 when signed in with Google.
To go the other way and see which country a number belongs to, use the country code lookup.
Next: if the same file holds emails
Contact lists usually carry emails next to the phones. Run those through the verify page: the first 100 email checks are free with a Google sign-in, no card. See also bulk email verification and pricing.
Try it now
Open the international dialing converter.
Common questions
How do I call the UK from the US?
Dial 011 (the US exit code), 44 (the UK country code), then the number without its first 0. London 020 7946 0958 becomes 011 44 20 7946 0958.
How do I call the US from the UK?
Dial 00, then 1, then the ten-digit number: 00 1 415 555 0132. From a mobile you can dial +1 415 555 0132 instead.
What does 00 before a number mean?
00 is the exit code in most of Europe, Africa, the Middle East and much of Asia. 0044 is the same as +44, written for dialling from one of those countries.
Do I always drop the leading 0?
Usually. Italy is the main exception: its landlines keep the 0, so Rome is +39 06 1234 5678.
Do I need the + when I dial?
On a mobile the + works from any country. On a landline or desk phone, dial the exit code in its place.
Check your list before you send
Real mailbox checks over SMTP, and nothing is sent to the address. Sign in with Google and your first 100 email checks are free, no card. Plans for bigger lists are on the pricing page.