Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WN3EFR callsign genealogy
Currently held by Singer, John B
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 WN3EFR's current licensee, walking backwards.
- Singer, John BINgranted 2008-07-28cancelled 2009-01-17
Successor callsigns
Callsigns held now by people who previously held WN3EFR.
No current licensee on record previously held this callsign.