Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1JSG callsign genealogy
Currently held by Gilmore, Jon S
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 W1JSG's current licensee, walking backwards.
- Gladstone, Jennifer SMAgranted 2018-09-14cancelled 2018-10-27
Successor callsigns
Callsigns held now by people who previously held W1JSG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1JSG, oldest first.
- Gilmore, Jon S MA2004-04-06 → cancelled 2016-04-07
- Gladstone, Jennifer S MA2018-10-27 active