Those are hex codes - it seems to show that when it doesn't know the reg or an aircraft doesn't report one http://www.milradiocomms.com/search_mil_hexcodes.php

Those are hex codes - it seems to show that when it doesn't know the reg or an aircraft doesn't report one http://www.milradiocomms.com/search_mil_hexcodes.php?type_of_search=hex_search&search_hexcode=AE0B60 http://www.milradiocomms.com/search_mil_hexcodes.php?type_of...