Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB1WWF callsign genealogy
Currently held by ROSENGARD, ROBERT 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 KB1WWF's current licensee, walking backwards.
- Farrington, William WMAgranted 2017-08-07cancelled 2017-08-26
Successor callsigns
Callsigns held now by people who previously held KB1WWF.
All historical holders
Every license row we've seen with the callsign KB1WWF, oldest first.
- ROSENGARD, ROBERT M MA2012-03-20 → cancelled 2012-04-28
- Farrington, William W MA2017-08-26 → cancelled 2017-10-28