Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WB5BPU callsign genealogy
Currently held by MERCK JR, WILLIAM 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 WB5BPU's current licensee, walking backwards.
- MERCK JR, WILLIAM ATXgranted 2014-05-23cancelled 2014-06-10
Successor callsigns
Callsigns held now by people who previously held WB5BPU.
- MERCK JR, WILLIAM ATXgranted 2014-05-23cancelled 2014-06-10