Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0SDK callsign genealogy
Currently held by Pierson, Robert N
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 K0SDK's current licensee, walking backwards.
- Pierson, Robert NMNgranted 2017-02-13cancelled 2017-03-04
Successor callsigns
Callsigns held now by people who previously held K0SDK.
No current licensee on record previously held this callsign.