Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1BOS callsign genealogy
Currently held by Mullaney, John O
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 K1BOS's current licensee, walking backwards.
- Mullaney, John OMAgranted 2006-10-16cancelled 2007-04-24
Successor callsigns
Callsigns held now by people who previously held K1BOS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1BOS, oldest first.
- MISSION, WALTER C CT1988-10-11 → cancelled 2000-10-12
- Mullaney, John O MA2017-01-31 active