Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5BJJ callsign genealogy
Currently held by ENG, CLARENCE W F
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 K5BJJ's current licensee, walking backwards.
- Mastrangelo, Francis MTXgranted 2017-04-26cancelled 2017-05-19
Successor callsigns
Callsigns held now by people who previously held K5BJJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5BJJ, oldest first.
- ENG, CLARENCE W F OK1995-07-18 → cancelled 2007-07-19
- Mastrangelo, Francis M TX2017-05-19 active