Largest number of amateur radio contacts in a year
Who
Andrey Fedorov
What
93,856 total number
Where
Austria (Vienna)
When

The largest number of amateur radio contacts in a year is 93,856, and was achieved by Andrey Fedorov (Austria) in Vienna, Austria, on 31 December 2018.

Andrey made the contacts using the call sign 4U1A from the International United Nations Amateur Radio Contest DX Club (ARCDXC).