Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4JK callsign genealogy
Currently held by Smith, Charles W
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 W4JK's current licensee, walking backwards.
- Smith, Charles WTXgranted 2016-04-05cancelled 2016-06-18
Successor callsigns
Callsigns held now by people who previously held W4JK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4JK, oldest first.
- MARSHALL, CHARLES E VA2006-05-31 → cancelled 2014-05-29
- Smith, Charles W TX2016-06-18 active