Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA4MDR callsign genealogy
Currently held by Law, John C
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 WA4MDR's current licensee, walking backwards.
- Law, John CALgranted 2006-05-01cancelled 2006-06-13
Successor callsigns
Callsigns held now by people who previously held WA4MDR.
- Law, John CALgranted 2017-06-07