Confidence: Medium · Source: FCC ULS · As of 2026-09-09
N4ZLH callsign genealogy
Currently held by MARWOOD, WILLIAM 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 N4ZLH's current licensee, walking backwards.
- Marwood-Wheeler, CherylFLgranted 2000-02-17cancelled 2002-09-25
Successor callsigns
Callsigns held now by people who previously held N4ZLH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4ZLH, oldest first.
- MARWOOD, WILLIAM E FL1990-07-17 → cancelled 2002-07-18
- SHULTZABERGER, CHERYL D FL2012-12-21 → cancelled 2024-09-26