Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N7LIS callsign genealogy
Currently held by Helman, Jeff S
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 N7LIS's current licensee, walking backwards.
- Helman, Jeff SWAgranted 2024-03-02cancelled 2024-03-22
Successor callsigns
Callsigns held now by people who previously held N7LIS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N7LIS, oldest first.
- DEXTER, MATTHEW K AZ1992-10-27 → cancelled 2004-10-28
- Helman, Jeff S WA2024-03-22 active