Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4ISS callsign genealogy
Currently held by EXPERIMENTERS GROUP AMATEUR RADIO CLUB
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 N4ISS's current licensee, walking backwards.
- LaPlante, Mark WALgranted 2015-04-23cancelled 2024-07-20
Successor callsigns
Callsigns held now by people who previously held N4ISS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4ISS, oldest first.
- EXPERIMENTERS GROUP AMATEUR RADIO CLUB SC2009-09-10 → cancelled 2021-12-07
- LaPlante, Mark W AL2024-07-20 active