Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K3JOS callsign genealogy
Currently held by PETTEBONE III, OLIVER B
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 K3JOS's current licensee, walking backwards.
- Kanfer, Joseph MPAgranted 2019-03-18cancelled 2019-04-26
Successor callsigns
Callsigns held now by people who previously held K3JOS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K3JOS, oldest first.
- PETTEBONE III, OLIVER B PA1999-11-04 → cancelled 2011-11-05
- Kanfer, Joseph M PA2019-04-26 active