Confidence: Medium · Source: FCC ULS · As of 2026-09-16
KC0ICN callsign genealogy
Currently held by MARTHALER, JO ANN M
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 KC0ICN's current licensee, walking backwards.
- MARTHALER, JO ANN MMNgranted 1994-07-28cancelled 2000-06-03
Successor callsigns
Callsigns held now by people who previously held KC0ICN.
No current licensee on record previously held this callsign.