Vokkl doesn't just auto-match a local caller ID; it draws that number from a rotation pool of numbers your account holds. Each number is used for up to 100 calls before Vokkl rotates it out and brings in a fresh one, which protects numbers from being flagged as spam after heavy use. From Settings → System → Phone numbers, admins can see each number's usage count against that cap, Buy a local number to add to the pool, and Flag, Check reputation, Resync, or Retire an individual number if it looks unhealthy or is getting blocked.