Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4KMM callsign genealogy
Currently held by MORSE, FRANK L
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 N4KMM's current licensee, walking backwards.
- Robert, Sean MFLgranted 2006-08-11cancelled 2006-12-23
Successor callsigns
Callsigns held now by people who previously held N4KMM.
- Robert, Sean MFLgranted 2019-11-30
All historical holders
Every license row we've seen with the callsign N4KMM, oldest first.
- MORSE, FRANK L TX1990-05-01 → cancelled 2002-05-02
- Robert, Sean M FL2016-10-13 → cancelled 2019-11-30