Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WW4MO callsign genealogy
Currently held by OLSON, MARTIN L
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 WW4MO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held WW4MO.
No current licensee on record previously held this callsign.