Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0CTS callsign genealogy
Currently held by MADER, JOSEPH 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 W0CTS's current licensee, walking backwards.
- Smith, Troy ACOgranted 2018-03-05cancelled 2019-06-01
Successor callsigns
Callsigns held now by people who previously held W0CTS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0CTS, oldest first.
- MADER, JOSEPH L ND1996-06-29 → cancelled 2008-07-01
- Smith, Troy A CO2019-06-01 active