Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF4YZW callsign genealogy
Currently held by GRANT, 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 KF4YZW's current licensee, walking backwards.
- N4ZZEcancelledcancelled 1998-06-22
Successor callsigns
Callsigns held now by people who previously held KF4YZW.
- GRANT, WILLIAM RGAgranted 2009-07-31cancelled 2021-10-29