Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4PDF callsign genealogy
Currently held by Fischer, Paul D
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 K4PDF's current licensee, walking backwards.
- Fischer, Paul DVAgranted 2008-08-04cancelled 2008-11-07
Successor callsigns
Callsigns held now by people who previously held K4PDF.
No current licensee on record previously held this callsign.