Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WH0T callsign genealogy
Currently held by Mercado, Michael 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 WH0T's current licensee, walking backwards.
- DIZON, SHERWIN EMPgranted 2016-08-23cancelled 2021-09-10
Successor callsigns
Callsigns held now by people who previously held WH0T.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WH0T, oldest first.
- Mercado, Michael M MP2003-05-29 → cancelled 2015-05-30
- DIZON, SHERWIN E MP2021-09-10 active