Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W7KOT callsign genealogy
Currently held by Pfost, Dean
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 W7KOT's current licensee, walking backwards.
- Zollinger, David RIDgranted 2010-04-21cancelled 2016-09-16
Successor callsigns
Callsigns held now by people who previously held W7KOT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7KOT, oldest first.
- PFOST, DEAN F ID1997-07-25 → cancelled 2009-07-28
- Pfost, Dean ID2010-05-04 → cancelled 2014-08-07
- Zollinger, David R ID2026-07-14 active