Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0TMM callsign genealogy
Currently held by Cowan, Johnny R
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 W0TMM's current licensee, walking backwards.
- Cowan, Johnny RNCgranted 2005-04-29cancelled 2005-08-23
Successor callsigns
Callsigns held now by people who previously held W0TMM.
No current licensee on record previously held this callsign.