Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA9ZSP callsign genealogy
Currently held by Concentine, William T
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 WA9ZSP's current licensee, walking backwards.
- Concentine, William TAZgranted 2019-12-19cancelled 2020-01-07
Successor callsigns
Callsigns held now by people who previously held WA9ZSP.
No current licensee on record previously held this callsign.