Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3BF callsign genealogy
Currently held by ERB, KARL A
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 W3BF's current licensee, walking backwards.
- ERB, KARL AMDgranted 2008-02-11cancelled 2014-04-15
Successor callsigns
Callsigns held now by people who previously held W3BF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3BF, oldest first.
- HEYDT, ROBERT G PA2005-06-14 → cancelled 2012-03-21
- ERB, KARL A MD2024-04-18 active