Hey RADIOPHONE, my call is not K0TC or K0TZ. Might help if you look it up correctly.
Just for the record I have been continuously licensed since 1957 (age 13) and held the calls of KN0LMZ (novice, passed the code) and K0LMZ (general, advance, passed the code). Upgraded to Extra in 2000. Vanity for 18 years (only vanity call I have ever held). Two QST articles by age 21. Numerous other articles in QST, QEX, NCJ, and upcoming in the Feb 2021 issue of Electric Radio. Graduate engineer, masters degree.
Care to compare?