Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4FTW callsign genealogy
Currently held by Sullivan, Michael G
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 N4FTW's current licensee, walking backwards.
- SHEETS, BRYAN DNCgranted 2018-03-05cancelled 2018-08-07
Successor callsigns
Callsigns held now by people who previously held N4FTW.
- Sullivan, Michael GTNgranted 2014-04-25cancelled 2020-08-15
All historical holders
Every license row we've seen with the callsign N4FTW, oldest first.
- Sullivan, Michael G TN2006-07-08 → cancelled 2014-04-25
- SHEETS, BRYAN D NC2018-08-07 active