Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1DNP callsign genealogy
Currently held by Grout, Don H
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 W1DNP's current licensee, walking backwards.
- Pyle II, Donald NVAgranted 2018-03-23cancelled 2018-05-04
Successor callsigns
Callsigns held now by people who previously held W1DNP.
- Grout, Don HOHgranted 2006-04-01cancelled 2007-02-23
All historical holders
Every license row we've seen with the callsign W1DNP, oldest first.
- Grout, Don H OH2005-01-28 → cancelled 2006-04-01
- Pyle II, Donald N FL2018-05-04 active