Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0DFZ callsign genealogy
Currently held by Pietenpol, Andrew C
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 K0DFZ's current licensee, walking backwards.
- Pietenpol, Andrew CMNgranted 2017-05-17cancelled 2017-06-06
Successor callsigns
Callsigns held now by people who previously held K0DFZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0DFZ, oldest first.
- PIETENPOL, DONALD D MN2005-02-11 → cancelled 2017-04-25
- Pietenpol, Andrew C WI2017-06-06 active