Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4OTB callsign genealogy
Currently held by SOLTIS, DOROTHY J
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 N4OTB's current licensee, walking backwards.
- Karabaich, John MALgranted 2020-07-30cancelled 2022-04-15
Successor callsigns
Callsigns held now by people who previously held N4OTB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4OTB, oldest first.
- SOLTIS, DOROTHY J NC2005-07-20 → cancelled 2017-10-17
- Karabaich, John M AL2022-04-15 active