Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4ISM callsign genealogy
Currently held by Welch, Sheri F
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 N4ISM's current licensee, walking backwards.
- Welch, Sheri FFLgranted 2002-01-22cancelled 2002-04-02
Successor callsigns
Callsigns held now by people who previously held N4ISM.
No current licensee on record previously held this callsign.