1923 and 1924 marked the zenith of long distance communication records and which culminated on the 18th of October 1924 with the First Trans-Global radio contact. Between 0615 and 0730 UTC Frank Bell (a sheep farmer) Z4AA (ZL4AA) in Shag Valley Otago New Zealand and Cecil Goyder (an 18 year old student) at Mill Hill School in London using the school callsign G2SZ communicated on the 90 metre band.

New Zealand Dxers are proud of the many ZL DXing milestones over the years. The Kiwi DX Group an informal group of ZL Dxers and contesters are commemorating this event and many other ZL firsts, which occurred during this period.

Join us in celebrating 90 years of DX in ZL. The Special Callsign ZM90DX will be in use between October 1, 2013 to October 31, 2014.