Highest note whistled
Who
Andrew Stanford
What
8,372.019 hertz(es)
Where
United States (Hanover)
When

The highest note whistled is 8,372.019 Hz (C9 standard notation), and was achieved by Andrew Stanford (USA) in Hanover, New Hampshire, USA, on 20 March 2019.

Andrew's friends urged him to attempt this record after figuring he could break it.