Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC7DL callsign genealogy
Currently held by GRENDAHL SR, REUBEN C
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 KC7DL's current licensee, walking backwards.
- LONG, DONALD EWAgranted 2016-05-17cancelled 2019-03-01
Successor callsigns
Callsigns held now by people who previously held KC7DL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC7DL, oldest first.
- GRENDAHL SR, REUBEN C WA2006-05-08 → cancelled 2018-08-01
- LONG, DONALD E WA2019-03-01 active