Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4PIO callsign genealogy
Currently held by ROGERS, PETER 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 K4PIO's current licensee, walking backwards.
- Majerski, PioCAgranted 2019-10-28cancelled 2019-11-26
Successor callsigns
Callsigns held now by people who previously held K4PIO.
- ROGERS, PETER ATNgranted 2024-07-23
All historical holders
Every license row we've seen with the callsign K4PIO, oldest first.
- ROGERS, PETER A TN2005-04-29 → cancelled 2014-05-09
- Majerski, Pio CA2019-11-26 active