Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD4ISK callsign genealogy
Currently held by Amspaugh, Samuel 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 WD4ISK's current licensee, walking backwards.
- Amspaugh, Samuel KTXgranted 2014-02-19cancelled 2014-06-03
Successor callsigns
Callsigns held now by people who previously held WD4ISK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WD4ISK, oldest first.
- AMSPAUGH, SAMUEL K TX1989-11-21 → cancelled 2002-03-07
- Amspaugh, Samuel K TX2014-06-03 → cancelled 2026-06-04