Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KN4AMP callsign genealogy
Currently held by MURPHY, ROBERT 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 KN4AMP's current licensee, walking backwards.
- MURPHY, ROBERT JNCgranted 2020-03-02cancelled 2020-03-20
Successor callsigns
Callsigns held now by people who previously held KN4AMP.
- MARSHALL, MELISSA JNCgranted 2017-02-22
All historical holders
Every license row we've seen with the callsign KN4AMP, oldest first.
- MARSHALL, MELISSA J NC2017-01-30 → cancelled 2017-02-22
- MURPHY, ROBERT J NC2020-03-20 active