Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NM4SH callsign genealogy
Currently held by HORAN, STEPHEN 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 NM4SH's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held NM4SH.
No current licensee on record previously held this callsign.