Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N6SIN callsign genealogy
Currently held by POLK, STANLEY M
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 N6SIN's current licensee, walking backwards.
- Alger IV, James RCAgranted 2010-07-30cancelled 2010-08-20
Successor callsigns
Callsigns held now by people who previously held N6SIN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N6SIN, oldest first.
- POLK, STANLEY M CA1998-02-25 → cancelled 2010-02-26
- Alger IV, James R CA2020-06-26 active