In the Admin Center, go to Resources > Carriers. You can add, edit, and delete global carriers.The form is the same as for project-level carriers. For the carrier settings, see Carriers.Phone numbers, recording buckets, and the carrier Test call tab are project-level. They aren’t available in the Admin Center.
The Used in column shows the projects that use a carrier. It shows Not used if nothing uses it.You can’t delete a carrier that is in use. Remove the carrier from those phone numbers first.
In Manage > AI & Voice Providers > Telephony > Carriers, global carriers appear with a Global badge. Projects can use them, for example when you add a phone number.Projects can’t edit or delete global carriers. To view the settings, open the carrier. In a project, you can set an active global carrier with an outbound gateway as the Click To Call default.