+421

The number +421 is the international telephone country code for Slovakia. As Wikipedia states:

After the dissolution of Czechoslovakia in 1993, the successor states, the Czech Republic and Slovakia, continued to share country code 42 until February 28, 1997, when the Czech Republic adopted 420 and Slovakia adopted 421.

It so happens that 421 is the name of our media outlet which, other than the number, has nothing to do with Slovakia. Or does it, and we just don't know it?

On the other hand, Slovakia ended the use of coal for electricity generation in 2024, becoming one of the cleanest countries in terms of energy generation thanks to nuclear power plants and hydroelectric energy.

Way to go, Slovakia!