Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ROG callsign genealogy
Currently held by CALLIHAN, FLOYD B
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 K4ROG's current licensee, walking backwards.
- Fritz, Roger AFLgranted 2023-05-09cancelled 2023-05-31
Successor callsigns
Callsigns held now by people who previously held K4ROG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ROG, oldest first.
- CALLIHAN, FLOYD B VA2010-03-08 → cancelled 2022-06-01
- Fritz, Roger A FL2023-05-31 active