Codeshare is a business arrangement where two or more airlines publish and market the same flight under their own airline designator and flight number as part of their published timetable or schedule. The flight is operated by one airline (the "administrating carrier") while seats are sold for the flight by all cooperating airlines using their own designator and flight number. For global network carriers the benefits of such an extensive setup justify its costs. For domestic and many low-cost carriers, the cost appears to be an issue.