Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W8SPU callsign genealogy
Currently held by Thompson, Cynthia M
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 W8SPU's current licensee, walking backwards.
- Thompson, Cynthia MAZgranted 2018-05-02cancelled 2018-05-22
Successor callsigns
Callsigns held now by people who previously held W8SPU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W8SPU, oldest first.
- SMITH, HELEN V OH1996-01-24 → cancelled 2001-06-11
- Thompson, Cynthia M AZ2004-08-07 → cancelled 2016-08-09
- Thompson, Cynthia M AZ2018-05-22 active