Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N3JAM callsign genealogy
Currently held by POLIAK, JOHN 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 N3JAM's current licensee, walking backwards.
- Melchor, JohnPAgranted 2019-03-21cancelled 2020-01-17
Successor callsigns
Callsigns held now by people who previously held N3JAM.
- MORERA, JOEL APRgranted 2017-03-20
All historical holders
Every license row we've seen with the callsign N3JAM, oldest first.
- POLIAK, JOHN M PA1991-03-26 → cancelled 2003-03-27
- MORERA, JOEL A PA2014-12-19 → cancelled 2017-03-20
- Melchor, John PA2020-01-17 active