In 1984 he got the call PE1KHP, and in 2000 he did changed it in PE2KP. On the old QSL card you can see the HF radio station Radio Kootwijk.
In 2009 he did used the call PE25KP, as 25 years of operation on the bands as a ham.
In 2011 he did changed it in PE2K. And that is the call he is still use on the air.
In 2014 he did used the call PE30K of 30 years active as a ham. See the QSL card.
PE2K is a full license, for all ham band. But PE2K is mostly QRV on 6m and all HF-bands, in all modes: cw, ssb, sstv, jt65, rtty, psk… for DX-ing.
PE2K is also a contesting freak, 599-001 😉