Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1PTM callsign genealogy
Currently held by ROBERTSON, JEFFREY 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 N1PTM's current licensee, walking backwards.
- WAGNER, MARK ANHgranted 2017-09-26cancelled 2026-04-14
Successor callsigns
Callsigns held now by people who previously held N1PTM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1PTM, oldest first.
- ROBERTSON, JEFFREY S MA1993-07-20 → cancelled 2005-07-21
- WAGNER, MARK A NH2026-04-14 active