Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N1TAM callsign genealogy
Currently held by SHELDON, MICHAEL J
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 N1TAM's current licensee, walking backwards.
- Mitzel, Terri AOHgranted 2014-06-24cancelled 2016-02-27
Successor callsigns
Callsigns held now by people who previously held N1TAM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1TAM, oldest first.
- SHELDON, MICHAEL J CT1994-09-09 → cancelled 2006-09-12
- MITZEL, TERRI A OH2016-02-27 active