ZL2TOY What is that? # ZL2TOY is a ham radio callsign. In fact it’s not just any callsign, it’s my father-in-laws former callsign and my current amateur radio operator callsign. After years of threating to do it, I finally went to a Ham Cram weekend and took the test to become an officially licensed operator. I have been threatening to do it for nearly 2 years now, and finally did it.