List of special regional designations
XAA Shared throughout the world
XAX Shared by several countries, but in a restricted area of the world
XMM This symbol is used in Column 4B to indicate the use of the frequency assignment for inter-ship communications, by the notifying administration indicated in Column B
XR1 Region 1 (RR 5.3)
XR2 Region 2 (RR 5.4)
XR3 Region 3 (RR 5.5)
XRY Antarctic Region (RR AP 26/5.2)
Number of symbols found = 7