Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4FIF callsign genealogy
Currently held by BRANDENBURG, MARTIN K
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 W4FIF's current licensee, walking backwards.
- SMITH, WILLIAM ASCgranted 2024-06-21cancelled 2026-09-01
Successor callsigns
Callsigns held now by people who previously held W4FIF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4FIF, oldest first.
- BRANDENBURG, KEITT S SC2007-09-20 → cancelled 2015-10-26
- BRANDENBURG, MARTIN K SC2017-10-14 → cancelled 2019-12-06
- SMITH, WILLIAM A SC2026-09-01 active