Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4NMF callsign genealogy
Currently held by CROWLEY, JOHN W
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 K4NMF's current licensee, walking backwards.
- HILL, JOSEPH WLAgranted 2017-06-07cancelled 2017-11-25
Successor callsigns
Callsigns held now by people who previously held K4NMF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4NMF, oldest first.
- CROWLEY, JOHN W NC1998-07-14 → cancelled 2010-07-15
- HILL, JOSEPH W SC2017-11-25 active