Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4CMM callsign genealogy
Currently held by GODSHALK, WILLIAM 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 N4CMM's current licensee, walking backwards.
- Marshall, Michael RALgranted 2009-10-21cancelled 2010-08-14
Successor callsigns
Callsigns held now by people who previously held N4CMM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4CMM, oldest first.
- GODSHALK, WILLIAM J FL1996-11-08 → cancelled 2008-11-11
- Marshall, Michael R AL2020-06-16 active