Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4ZLK callsign genealogy
Currently held by ROLL, HAROLD E
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by K4ZLK's current licensee, walking backwards.
- ROLL, HAROLD EGAgranted 2014-11-10cancelled 2017-11-17
Successor callsigns
Callsigns held now by people who previously held K4ZLK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ZLK, oldest first.
- FOSTER, WAYNE J OR1998-05-28 → cancelled 2010-05-29
- ROLL, HAROLD E TN2017-11-17 active