Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W5IZO callsign genealogy
Currently held by THOMPSON, CHARLIE B
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 W5IZO's current licensee, walking backwards.
- MC DONALD, JEFF SNMgranted 2015-11-18cancelled 2015-12-08
Successor callsigns
Callsigns held now by people who previously held W5IZO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5IZO, oldest first.
- THOMPSON, CHARLIE B NM1990-01-09 → cancelled 2001-04-04
- MC DONALD, JEFF S NM2015-12-08 active