Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA1CTF callsign genealogy
Currently held by BUTKIEWICZ SR, JOSEPH F
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 KA1CTF's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KA1CTF.
- BUTKIEWICZ SR, JOSEPH FGAgranted 2009-07-18cancelled 2018-04-24