Where can I find a country list for Azure sms or call authentication?

Velez, Andres 1 Reputation point
2023-01-10T18:08:25.88+00:00

We have international students that need to be able to authenticate themselves with their international numbers. I see that not all international country codes are accepted/work when we add them to their account in Azure for sms or call multifactor authentication.

Where can we get a list of country codes and phone number formats so that we can have students use international numbers for multifactor authentication?

Thanks for your time and support, Andres

Microsoft Security | Microsoft Entra | Microsoft Entra ID
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  1. James Hamil 27,221 Reputation points Microsoft Employee Moderator
    2023-01-10T20:49:25.713+00:00

    Hi @Velez, Andres , we don't have an exact list of suported phone numbers, just that they'll need to provide phone numbers in E.164 international standard format. For example, +14255550123. The Toll Free Verification page also has some more details.  This document has troubleshooting steps for these issues. Please walk through them and let me know if it helps.

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    If these steps don't work please let me know the following information: What are the errors your students are running into? Also, could you provide an example of a numbers and the countries they're from?

    If this answer helped you please mark it as "Verified" so other users can reference it.

    Thank you, James

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