Dial codes
Type the number you would dial at home. The tool rewrites it in international form, shows every change it made so you can check it, and tells you which prefix to dial first from where you are.
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The call
Type it the way you would dial it at home, including the 0 in front if your country uses one.
The number to dial
Enter the number you would dial at home.
A call from a messaging or calling app over Wi-Fi is usually free. A phone call made over the cellular network is charged by your own plan — if the number matters, use the app.
Official source
https://www.itu.int/en/ITU-T/inr/Pages/default.aspx
Checked 2026-10-23 · ITU: international numbering resources (Recommendation E.164)