Prefixes

The original prefixes award (WPX) is administered by CQ Magazine.

Some national awards are also available.

Worked Croatian Amateur Radio Prefixes (Croatia)
California Prefix Award (USA)
PX Indonesia
LY WPX Trophy (Lithuania)
WPX Award (USA)
Worked Slovenia Prefixes (Slovenia)

Please note that the awards listed above are just examples of my collection of nearly 3,000 certificates