Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4PHD callsign genealogy
Currently held by SMITH, HERBERT C
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 W4PHD's current licensee, walking backwards.
- WHIPPLE IV, CHARLES WFLgranted 2007-04-25cancelled 2009-10-31
Successor callsigns
Callsigns held now by people who previously held W4PHD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4PHD, oldest first.
- SMITH, HERBERT C FL1993-01-12 → cancelled 2005-01-13
- WHIPPLE IV IV, CHARLES W FL2019-09-06 active