Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SH callsign genealogy
Currently held by ALLIS, JOSEPH C
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 K4SH's current licensee, walking backwards.
- Allis, JohnARgranted 2013-03-22cancelled 2019-02-22
Successor callsigns
Callsigns held now by people who previously held K4SH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4SH, oldest first.
- ALLIS, JOSEPH C FL2009-01-10 → cancelled 2018-12-29
- Allis, John AR2019-02-22 active