Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4BLH callsign genealogy
Currently held by Harlan, Benjamin 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 K4BLH's current licensee, walking backwards.
- Harlan, Benjamin LFLgranted 2020-09-24cancelled 2020-10-14
Successor callsigns
Callsigns held now by people who previously held K4BLH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4BLH, oldest first.
- CRAWSHAW, MIKE KY2007-05-22 → cancelled 2019-05-23
- Harlan, Benjamin L FL2020-10-14 active