Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC1DX callsign genealogy
Currently held by ABRANTES, MAURO L
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 KC1DX's current licensee, walking backwards.
- Black, Christian JMEgranted 2019-06-12cancelled 2024-01-03
Successor callsigns
Callsigns held now by people who previously held KC1DX.
- ABRANTES, MAURO LCTgranted 2021-04-20
All historical holders
Every license row we've seen with the callsign KC1DX, oldest first.
- SWENSON, PAUL B FL2001-07-18 → cancelled 2013-10-16
- ABRANTES, MAURO L CT2013-11-09 → cancelled 2021-04-20
- Black, Christian J ME2024-01-03 active