International phone number format for bulk SMS text messages

When sending bulk SMS text messages using Web Messenger or one of our Developer APIs, you should always use the ITU-T recommended E.164 International Phone Number Format.

Examples of numbers in International Phone Number Format

The following table gives a few examples of how to convert a local number into the correct format for our SMS gateway:

The recipient is in Their country code Their local number Their International Phone Number Format
China 86 (10) 69445464 861069445464
France 33 06 87 71 23 45 33687712345
Nigeria 234 080312345 23480312345
United Kingdom 44 07700 954 321 447700954321
United States 1 (954) 555-1234 19545551234
Venezuela 58 (0295) 416,72,16

Numbers that are correctly formatted:

  • Start with the country code of the country the message is being sent to
  • Only contain the digits 0123456789
  • Do not contain spaces or punctuation
  • Do not include the international dialling prefix which is often 011 (e.g. in the USA), 00 (e.g. in Europe, South America) but is sometimes 001 (e.g. in Japan) or 009 (in Nigeria) etc.

International Phone Number Format checker

Use our number checker to convert a local number into the International Phone Number Format.

Check your phone number

What will happen if I don't use the International Phone Number Format?

When you submit mobile numbers to our SMS gateway that are not in the International Phone Number Format our system will automatically convert into the correct format for the country your account was registered from.

Bulk SMS text messages delivered globally in seconds


Bulk SMS text messages delivered globally in seconds


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