Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4WLU callsign genealogy
Currently held by Routh, Michael E
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 KD4WLU's current licensee, walking backwards.
- Routh, Michael ENCgranted 2014-12-17cancelled 2015-01-06
Successor callsigns
Callsigns held now by people who previously held KD4WLU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4WLU, oldest first.
- ROUTH, MICHAEL E NC1993-01-26 → cancelled 2005-01-27
- Routh, Michael E NC2024-11-30 active