Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N3MBK callsign genealogy
Currently held by Krzan, Mark 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 N3MBK's current licensee, walking backwards.
- Krzan, Mark BPAgranted 2010-04-20cancelled 2014-11-14
Successor callsigns
Callsigns held now by people who previously held N3MBK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N3MBK, oldest first.
- BONFANTI, PAUL M PA1992-04-28 → cancelled 2004-04-29
- Krzan, Mark B PA2024-10-17 active