Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3CJS callsign genealogy
Currently held by SHAFER, ROBERT H
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 W3CJS's current licensee, walking backwards.
- SHAFER, ROBERT HPAgranted 2017-08-24cancelled 2020-08-07
Successor callsigns
Callsigns held now by people who previously held W3CJS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3CJS, oldest first.
- LATHE SR, WARREN C MD1990-09-25 → cancelled 2002-09-26
- SHAFER, ROBERT H PA2020-08-07 active