Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4SPH callsign genealogy
Currently held by ZIDANK, TONY
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 W4SPH's current licensee, walking backwards.
- Heeney, Shea PTNgranted 2019-03-20cancelled 2019-04-09
Successor callsigns
Callsigns held now by people who previously held W4SPH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4SPH, oldest first.
- ZIDANK, TONY TN1987-09-08 → cancelled 1999-09-10
- Heeney, Shea P TN2019-04-09 active