Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0MPB callsign genealogy
Currently held by Karstens, Justin 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 W0MPB's current licensee, walking backwards.
- Karstens, Justin JMNgranted 2022-12-06cancelled 2022-12-24
Successor callsigns
Callsigns held now by people who previously held W0MPB.
No current licensee on record previously held this callsign.