Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4IDX callsign genealogy
Currently held by ABERNATHY, GREGORY R
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 K4IDX's current licensee, walking backwards.
- ABERNATHY, GREGORY Rcancelled 1998-10-05
Successor callsigns
Callsigns held now by people who previously held K4IDX.
- SHARP, FRANK HIAgranted 2026-04-11