Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4MAB callsign genealogy
Currently held by LANGLEY, JONATHAN E
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 K4MAB's current licensee, walking backwards.
- LANGLEY, JONATHAN EGAgranted 2006-03-09cancelled 2007-06-22
Successor callsigns
Callsigns held now by people who previously held K4MAB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4MAB, oldest first.
- LANGLEY SR, JAMES E FL1997-03-10 → cancelled 1998-11-06
- LANGLEY, JONATHAN E GA2017-06-06 active