Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4WRM callsign genealogy
Currently held by Maher, William 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 KO4WRM's current licensee, walking backwards.
- Maher, William RGAgranted 2020-07-13cancelled 2020-07-31
Successor callsigns
Callsigns held now by people who previously held KO4WRM.
- Maher, William RGAgranted 2020-07-31