The first tab under the voice section is phone numbers, as shown in the following screenshot. This is where the numbers assigned to you will be displayed:
Voice phone numbers
The list shows all phone numbers, their location, whether they're available or assigned, if they are a user number or a service number, and the status (hopefully, activated).
You can filter the list by number range, number status, assignment status (user, conference, or unassigned), number type (user, service, and toll-free), and city. You can use the search function to look up a specific number, numbers starting with an area code ...
