Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4TAN callsign genealogy
Currently held by Cohen, Robert J
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 N4TAN's current licensee, walking backwards.
- Cohen, Robert JNCgranted 2014-04-07cancelled 2014-09-05
Successor callsigns
Callsigns held now by people who previously held N4TAN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4TAN, oldest first.
- COHEN, ROBERT J NC1992-02-11 → cancelled 2004-02-12
- Cohen, Robert J NC2025-07-12 active