Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4RTN callsign genealogy
Currently held by MADDOCK, WILLIAM 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 W4RTN's current licensee, walking backwards.
- TIPTON, RICHARD ETNgranted 2023-04-18cancelled 2023-05-09
Successor callsigns
Callsigns held now by people who previously held W4RTN.
- MADDOCK, WILLIAM CTNgranted 2018-12-29
All historical holders
Every license row we've seen with the callsign W4RTN, oldest first.
- KETRING, EUGENE FL2005-08-13 → cancelled 2017-08-15
- MADDOCK, WILLIAM C TN2018-05-22 → cancelled 2018-12-29
- TIPTON, RICHARD E TN2023-05-09 active