Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WB4OBS callsign genealogy
Currently held by MUTRO, ANTHONY D
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 WB4OBS's current licensee, walking backwards.
- MUTRO, ANTHONY DNCgranted 2004-10-12cancelled 2006-12-19
Successor callsigns
Callsigns held now by people who previously held WB4OBS.
- MUTRO, ANTHONY DNCgranted 2006-12-19cancelled 2014-06-21