Country Calling Codes

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how to dial internationally country code

How to dial internationally: exit code, country code, trunk zero

Use the "How to call" block of the tool: pick the origin and destination country, and it builds the sequence step by step, with a copy button.

The four parts of an international call

An international call has up to four parts, in this order. First the exit prefix, which tells the exchange the call is leaving the country. Then, if the country requires it, the carrier code. Next the destination country code. Last the national number, without the trunk zero. The exit prefix is 00 in about 196 of the 250 entries in the dataset, 011 in the United States, Canada and 25 others, 010 in Japan, 0011 in Australia, and 8 followed by a pause and 10 in Russia.
In Brazil the prefix is 00, and picking a carrier is mandatory: after the 00 comes a two-digit code, such as 15, 21, 31 or 41, and only then the country code. A call to Chile would read 00 15 56, then the number. The code also shows up in other countries, such as South Korea and Thailand, but in the vast majority the prefix alone is enough. When in doubt, check with your carrier, since the rule can vary by plan.
As for the trunk zero, the rule is to drop it. In Germany, the United Kingdom, China and Pakistan the national number starts with 0, and that 0 is not dialed from outside the country: 030 becomes 30. Some countries have no trunk, such as Spain, Portugal and Mexico, and Italy keeps the 0 of landlines because it is part of the number. The tool knows each case and removes the zero only when it should.
The universal shortcut is the plus sign. On any mobile phone, +, the country code and the number replace the exit prefix and the carrier code, because the phone swaps the + for the right prefix of the network it is on. Saving contacts in that format, +55 11 91234 5678, makes them work while traveling without rewriting anything. On a landline there is no + key and you go back to the full sequence.

Checked examples

From Brazil to Portugal

Input: 912 345 678 (operadora 15)
Expected output: 00 15 351 912345678

Portugal has no trunk zero.

From the US to Brazil

Input: (11) 96123-4567
Expected output: 011 55 11961234567

The area code 11 stays in the number.

From Russia to China

Input: 131 2345 6789
Expected output: 8 10 86 13123456789

The 8 calls for a pause until the second tone.

From Japan to Germany

Input: 0151 2345 6789
Expected output: 010 49 15123456789

The Japanese prefix is 010.

From Australia to New Zealand

Input: 021 123 4567
Expected output: 0011 64 211234567

The Australian prefix is 0011.

Full tool FAQ

What is the country code for the United States?

The United States uses +1, the same code as Canada and 23 other territories. Its ISO codes are US, USA and 840, and its domain is .us. The area code after +1 tells the countries apart: 212 is New York and the United States, 416 is Toronto and Canada.

What is the difference between a country code and an area code?

How do I call another country from the United States?

Why do some countries share the same calling code?

What do "AT country code" and "AU country code" mean?

Do China, Hong Kong, Macau and Taiwan share a code?

Do I dial the leading zero on an international call?

What is the right format for WhatsApp?

Do country codes change?

Where does the data come from?

Frequently asked questions

What is the difference between a country code, an area code and a carrier code?

The country code names the country, the area code names the region inside it, and a carrier code picks the company that carries the call.

Can I use + on a landline?

No, it exists only on mobiles. On a landline, use the full sequence with the exit prefix.

Does calling abroad always need a carrier code?

No. It is required in Brazil and a few other countries; in most, the exit prefix is enough.

Next steps

The four parts of an international call

An international call has up to four parts, in this order. First the exit prefix, which tells the exchange the call is leaving the country. Then, if the country requires it, the carrier code. Next the destination country code. Last the national number, without the trunk zero. The exit prefix is 00 in about 196 of the 250 entries in the dataset, 011 in the United States, Canada and 25 others, 010 in Japan, 0011 in Australia, and 8 followed by a pause and 10 in Russia.

In Brazil the prefix is 00, and picking a carrier is mandatory: after the 00 comes a two-digit code, such as 15, 21, 31 or 41, and only then the country code. A call to Chile would read 00 15 56, then the number. The code also shows up in other countries, such as South Korea and Thailand, but in the vast majority the prefix alone is enough. When in doubt, check with your carrier, since the rule can vary by plan.

As for the trunk zero, the rule is to drop it. In Germany, the United Kingdom, China and Pakistan the national number starts with 0, and that 0 is not dialed from outside the country: 030 becomes 30. Some countries have no trunk, such as Spain, Portugal and Mexico, and Italy keeps the 0 of landlines because it is part of the number. The tool knows each case and removes the zero only when it should.

The universal shortcut is the plus sign. On any mobile phone, +, the country code and the number replace the exit prefix and the carrier code, because the phone swaps the + for the right prefix of the network it is on. Saving contacts in that format, +55 11 91234 5678, makes them work while traveling without rewriting anything. On a landline there is no + key and you go back to the full sequence.

Checked examples

From Brazil to Portugal

Input: 912 345 678 (operadora 15)
Expected output: 00 15 351 912345678

Portugal has no trunk zero.

From the US to Brazil

Input: (11) 96123-4567
Expected output: 011 55 11961234567

The area code 11 stays in the number.

From Russia to China

Input: 131 2345 6789
Expected output: 8 10 86 13123456789

The 8 calls for a pause until the second tone.

From Japan to Germany

Input: 0151 2345 6789
Expected output: 010 49 15123456789

The Japanese prefix is 010.

From Australia to New Zealand

Input: 021 123 4567
Expected output: 0011 64 211234567

The Australian prefix is 0011.

Full tool FAQ

What is the country code for the United States?

What is the difference between a country code and an area code?

How do I call another country from the United States?

Why do some countries share the same calling code?

What do "AT country code" and "AU country code" mean?

Do China, Hong Kong, Macau and Taiwan share a code?

Do I dial the leading zero on an international call?

What is the right format for WhatsApp?

Do country codes change?

Where does the data come from?

Frequently asked questions

What is the difference between a country code, an area code and a carrier code?

The country code names the country, the area code names the region inside it, and a carrier code picks the company that carries the call.

Can I use + on a landline?

No, it exists only on mobiles. On a landline, use the full sequence with the exit prefix.

Does calling abroad always need a carrier code?

No. It is required in Brazil and a few other countries; in most, the exit prefix is enough.