Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4OTA callsign genealogy
Currently held by SHELL, MARCIA 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 K4OTA's current licensee, walking backwards.
- SHELL, MARCIA AVAgranted 2013-02-04cancelled 2013-02-26
Successor callsigns
Callsigns held now by people who previously held K4OTA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4OTA, oldest first.
- SCHWIEKER, PAUL B AL1988-01-19 → cancelled 2000-01-20
- SHELL, MARCIA A NH2025-01-22 active