California Code, Public Utilities Code - PUC § 495

(a) Between all points within this state and all points outside the state upon its route.

(b) Between all points within this state and all points outside the state upon every route leased, operated, or controlled by it.

(c) Between all points on its route or upon any route, leased, operated, or controlled by it within this state and all points outside the state upon the route of any other telegraph or telephone corporation, whenever a through route and joint rate have been established between any two of these points.