United Nations · Amateur Radio

Welcome to 4U1UN

The United Nations Headquarters Amateur Radio Station, operated by the United Nations Staff Recreation Council Amateur Radio Club.

United Nations Staff Recreation Council Amateur Radio Club emblem United Nations Staff
Recreation Council
Amateur Radio Club
4U1UN amateur radio station at United Nations Headquarters
4U1UN · United Nations Headquarters Amateur Radio Station

On the air

Station activity

November 2025 operating summary

4U1UN November 2025 operating summary by band and mode

Select the statistics image to view it at full size.

Statistics prepared withSH5 Contest Log Analyzer

Radio conditions

Solar-terrestrial data

Current solar and propagation information supplied by HamQSL.

Current solar-terrestrial data from HamQSL

View solar information

In memoriam

Dr. Max C. de Henseler

HB9RS

Silent Key (SK) 2013

Founder of 4U1UN.

Max, HB9RS

Dr. Max C. de Henseler, HB9RS
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