Retrieve a list of phone numbers owned by the account using keyset (cursor/bookmark) pagination. Start with no cursor to fetch the first page, then pass the next_cursor returned in pagination to fetch the following page. has_more is false and next_cursor is null on the last page. A cursor is bound to the filter set that produced it: replaying it with a different set of filters returns 422. Only per_page may change between pages; to change any other filter, restart without a cursor.