Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1GGM callsign genealogy
Currently held by KOSKI, JOSEPH T
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 N1GGM's current licensee, walking backwards.
- Tmeizeh, JanTNgranted 2016-03-10cancelled 2016-09-10
Successor callsigns
Callsigns held now by people who previously held N1GGM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1GGM, oldest first.
- KOSKI, JOSEPH T MA1999-09-17 → cancelled 2005-10-03
- Tmeizeh, Jan TN2026-09-11 active