Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5ISJ callsign genealogy
Currently held by MODERN, 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 K5ISJ's current licensee, walking backwards.
- JOSAN, IQBALTXgranted 2015-03-30cancelled 2015-04-18
Successor callsigns
Callsigns held now by people who previously held K5ISJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5ISJ, oldest first.
- MODERN, ROBERT J NM1997-10-23 → cancelled 2009-10-24
- JOSAN, IQBAL S TX2025-01-28 active