Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N1DFM callsign genealogy
Currently held by COHEN, ANDREW R
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 N1DFM's current licensee, walking backwards.
- COHEN, ANDREW RTXgranted 2021-05-21cancelled 2021-06-11
Successor callsigns
Callsigns held now by people who previously held N1DFM.
- COHEN, ANDREW RTXgranted 2021-07-16
All historical holders
Every license row we've seen with the callsign N1DFM, oldest first.
- PITRELLI, JOHN F CT2005-10-08 → cancelled 2017-10-11
- COHEN, ANDREW R TX2021-06-11 → cancelled 2021-07-16