Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1ENS callsign genealogy
Currently held by SHEFFER, ERIC N
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 N1ENS's current licensee, walking backwards.
- SHEFFER, ERIC NMAgranted 2016-09-09cancelled 2016-10-01
Successor callsigns
Callsigns held now by people who previously held N1ENS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1ENS, oldest first.
- CASSELL SR, ROBERT X MA1998-05-11 → cancelled 2010-05-12
- SHEFFER, ERIC N MA2026-08-19 active