Get phone numbers for your users in Teams

1. Sign into the Microsoft Teams admin center.

2. In the left navigation, go to Voice > Phone numbers, and then select Add.

3. Enter a name for the order and add a description.

4. On the Location and quantity page, do the following:

   1. Under Country or region, select a country or region.
   2. Under Number type, select User (subscriber).
   3. Under Operator, select an operator.
   4. Under Quantity, enter the number of numbers that you want for your organization.
   5. Under Search for new numbers, select a location by searching for city name, area code, or postal code. If you need to create a new location, select Add a location.
   6. Under Area code, select an area code.
   7. Select Next to select your numbers.

5. Select the numbers you want. You have 10 minutes to select your phone numbers and place your order. If you take more than 10 minutes, the phone numbers will be returned to the pool of numbers.

6. When you're ready to place your order, select Place order.

Reference: Get phone numbers for your users