OptionallimitOptionalnumberRestrict to the contacts of a single owned phone number. Counts and the latest interaction are then that line's alone. An id that isn't on your account yields an empty page rather than an error.
OptionalstartingExclusive cursor — the lastAt of the last contact from the previous page.
Only contacts with strictly older activity are returned.
Max contacts in the page (1–1000; default 100).