It is sometimes useful to know if a destination is overlaid without affecting the current status of that number. The overlayList function allows you query the current status of some or all of your overlays. Results can be filtered by the source, dialled or destination number and all the information about matching overlays is returned. Results are provided in a paginated fashion.
Check the status of all overlays to a specific destination
Note, due to the potentially very large size of a response, results are limited by default to 50 at a time. If requests are returning more results than this it is probably worth improving your filters