Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4KOP callsign genealogy
Currently held by FISCHER, GREGORY
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 N4KOP's current licensee, walking backwards.
- Heacock, William ASCgranted 2008-10-02cancelled 2017-05-26
Successor callsigns
Callsigns held now by people who previously held N4KOP.
All historical holders
Every license row we've seen with the callsign N4KOP, oldest first.
- Parker, Bruce L TN2005-05-06 → cancelled 2017-05-09
- Heacock, William A SC2017-05-26 → cancelled 2018-11-24
- FISCHER, GREGORY— → cancelled 1998-12-30