Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA7SDM callsign genealogy
Currently held by MC ENTARFFER, STEVEN 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 WA7SDM's current licensee, walking backwards.
- MC ENTARFFER, STEVEN DORgranted 2018-05-11cancelled 2019-02-14
Successor callsigns
Callsigns held now by people who previously held WA7SDM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA7SDM, oldest first.
- MC COMMAS, ALBERT G AZ2006-10-04 → cancelled 2018-12-11
- MC ENTARFFER, STEVEN D OR2019-02-14 active