Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4OIB callsign genealogy
Currently held by FOSTER, TIMOTHY N
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 K4OIB's current licensee, walking backwards.
- FOSTER, TIMOTHY NNCgranted 2010-02-22cancelled 2011-11-18
Successor callsigns
Callsigns held now by people who previously held K4OIB.
No current licensee on record previously held this callsign.