# How to enter an international phone number in a form

> How to enter a foreign phone number in a form: the + sign, the country code, dropping the trunk 0. Mobile formats for 14 countries, from +1 to +62.

- URL: https://keepanumber.com/guides/international-phone-number-format
- Last updated: 2026-10-18
- Publisher: KeepANumber (https://keepanumber.com/)

**Quick answer: How do I write a phone number in international format?**

Write a plus sign, the country calling code, then the national number without its leading 0: 07700 900123 in the UK becomes +44 7700 900123. US and Canadian numbers already have no 0: +1 then ten digits. Formats below come from national numbering plans filed with the ITU, checked October 2026.

## The three rules

1. Start with **+** (or 00 from most countries, 011 from the US and Canada).
2. Add the **country calling code**: 1, 44, 49, 33 and so on.
3. Add the **national number without its trunk prefix**, usually a leading 0. Italy's mobiles, Spain and Poland have no trunk 0 to drop.

Many forms have a separate country selector. Choose the country there and type only the national number, or the form may add the code twice.

## Mobile formats by country

*Mobile number formats, checked 2026-10-18*
| Country | Calling code | Mobile format |
| --- | --- | --- |
| [United States](https://keepanumber.com/numbers/united-states) | +1 | +1 NXX NXX XXXX (10 digits, no mobile prefix) |
| [United Kingdom](https://keepanumber.com/numbers/united-kingdom) | +44 | +44 7XXX XXXXXX (07 nationally) |
| [Canada](https://keepanumber.com/numbers/canada) | +1 | +1 NXX NXX XXXX (10 digits, no mobile prefix) |
| [Germany](https://keepanumber.com/numbers/germany) | +49 | +49 15x / 16x / 17x … |
| [France](https://keepanumber.com/numbers/france) | +33 | +33 6 or +33 7 XX XX XX XX |
| [Netherlands](https://keepanumber.com/numbers/netherlands) | +31 | +31 6 XXXXXXXX |
| [Spain](https://keepanumber.com/numbers/spain) | +34 | +34 6XX XXX XXX or 7[1–4]X … |
| [Italy](https://keepanumber.com/numbers/italy) | +39 | +39 3XX XXX XXXX |
| [Poland](https://keepanumber.com/numbers/poland) | +48 | +48 5X / 6X / 7X / 88 … (9 digits) |
| [Sweden](https://keepanumber.com/numbers/sweden) | +46 | +46 70 / 72 / 73 / 76 / 79 … |
| [Australia](https://keepanumber.com/numbers/australia) | +61 | +61 4XX XXX XXX |
| [Brazil](https://keepanumber.com/numbers/brazil) | +55 | +55 AA 9XXXX XXXX |
| [Mexico](https://keepanumber.com/numbers/mexico) | +52 | +52 XX XXXX XXXX (10 digits) |
| [Indonesia](https://keepanumber.com/numbers/indonesia) | +62 | +62 8XX … |

## Common mistakes

- Keeping the 0: +44 07700 900123 is wrong; +44 7700 900123 is right.
- Dialling +52 1 for Mexican mobiles: the extra 1 was removed on 3 August 2019.
- Using eight digits for Brazilian mobiles: since 2016 they have nine, starting with 9.
- Choosing the United States for a Canadian +1 number: the code is shared, the country is not.

## What is E.164?

E.164 is the ITU standard for international numbers: a plus sign, the country code and the subscriber number, at most 15 digits, without spaces. +447700900123 is the E.164 form of the UK example above. Many sign-up forms store numbers this way even when they let you type spaces.

## Questions about formats

### Where do I find my rented number in international form?

The rental page shows it with its country code, ready to copy.

### Should I type spaces or dashes?

Most forms accept them and remove them. If one refuses, type digits only.

### Why does a form say my number is invalid?

Often the trunk 0 is still there, or the wrong country is selected. If the format is right, the service may not accept that kind of number.

**Rent a number in a few minutes** Top up from $10 in crypto, choose a country and a period. No ID upload, no selfie. [See prices](https://keepanumber.com/pricing) · [How it works](https://keepanumber.com/how-it-works)

- [ITU national numbering plans index](https://www.itu.int/oth/T0202.aspx?parent=T0202), read 2026-10-18
- [ITU, UK national numbering plan (13 January 2025)](https://www.itu.int/dms_pub/itu-t/oth/02/02/T02020000DD0004PDFE.pdf), read 2026-10-18
- [ITU, Mexican national numbering plan (5 July 2024)](https://www.itu.int/dms_pub/itu-t/oth/02/02/T020200008A0004PDFE.pdf), read 2026-10-18
- [ITU, Brazilian national numbering plan (10 December 2015)](https://www.itu.int/dms_pub/itu-t/oth/02/02/T020200001D0003PDFE.pdf), read 2026-10-18

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