Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC3K callsign genealogy
Currently held by Mahr, Alicja
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 KC3K's current licensee, walking backwards.
- Mahr, AlicjaMAgranted 2025-02-04cancelled 2025-04-08
Successor callsigns
Callsigns held now by people who previously held KC3K.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC3K, oldest first.
- EHRREICH, STEWART J FL2013-01-07 → cancelled 2025-03-20
- Mahr, Alicja MA2025-04-08 active