Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD4COP callsign genealogy
Currently held by LAMAR, JO ANNE A
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 WD4COP's current licensee, walking backwards.
- Pfenninger, Jonathan RGAgranted 2021-02-01cancelled 2021-03-09
Successor callsigns
Callsigns held now by people who previously held WD4COP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WD4COP, oldest first.
- LAMAR, JO ANNE A PA1993-10-05 → cancelled 2005-10-06
- Pfenninger, Jonathan R NC2021-03-09 active