Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1ADC callsign genealogy
Currently held by CROFT, ALFRED D
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 W1ADC's current licensee, walking backwards.
- CSIZMADIA, ANDRE DCTgranted 2022-07-26cancelled 2023-06-22
Successor callsigns
Callsigns held now by people who previously held W1ADC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1ADC, oldest first.
- CROFT, ALFRED D MA2009-04-21 → cancelled 2021-04-22
- CSIZMADIA, ANDRE D CT2023-06-22 active