[Digital (406 MHz) Beacons] There is no charge to register 406 beacons (see below).[10] Unless otherwise advised, personal information is used exclusively for SAR distress alert resolution purposes Hex Code registration is mandatory in most countries of the world[citation needed] Beacons are registered with MCCs who have 24-hour access to registry data, such as: Name of the owner of the beacon Name or callsign of the ship, aircraft, or other vehicle the beacon is associated with Cellular, MMSI, pager numbers, or other contact information [Analog (121.5 MHz) Beacons] 
Anonymous beacons cannot be registered