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

Question

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

Answer 1

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.

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