Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1TOP callsign genealogy
Currently held by HARMACEK, DAVID W
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 W1TOP's current licensee, walking backwards.
- HARMACEK, DAVID WMAgranted 2015-06-04cancelled 2015-09-29
Successor callsigns
Callsigns held now by people who previously held W1TOP.
- Cox, Terel HCAgranted 2015-02-13
All historical holders
Every license row we've seen with the callsign W1TOP, oldest first.
- Cox, Terel H CA2004-06-11 → cancelled 2005-04-01
- HARMACEK, DAVID W NH2015-09-29 active