Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WM2O callsign genealogy
Currently held by CALLINAN, JOHN F
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 WM2O's current licensee, walking backwards.
- Murphy, Walter PVTgranted 1999-01-28cancelled 2008-06-24
Successor callsigns
Callsigns held now by people who previously held WM2O.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WM2O, oldest first.
- CALLINAN, JOHN F NJ1988-12-13 → cancelled 2000-12-14
- Murphy, Walter P VT2018-04-17 active