Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WN4EHF callsign genealogy
Currently held by BLUMBERG, DAVID M
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 WN4EHF's current licensee, walking backwards.
- BLUMBERG, DAVID MGAgranted 2015-11-24cancelled 2016-09-16
Successor callsigns
Callsigns held now by people who previously held WN4EHF.
No current licensee on record previously held this callsign.