Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5BLB callsign genealogy
Currently held by BUCHHOLZ, ROBERT L
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 K5BLB's current licensee, walking backwards.
- BUCHHOLZ, ROBERT LTXgranted 2006-04-20cancelled 2015-05-08
Successor callsigns
Callsigns held now by people who previously held K5BLB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5BLB, oldest first.
- MAHAN, SIDNEY W TX2006-04-06 → cancelled 2008-02-25
- BUCHHOLZ, ROBERT L TX2025-04-15 active