Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA8ZFD callsign genealogy
Currently held by Dellinger III, John O
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 WA8ZFD's current licensee, walking backwards.
- Ingalsbe, Caleb DMIgranted 2010-04-30cancelled 2010-08-17
Successor callsigns
Callsigns held now by people who previously held WA8ZFD.
- Dellinger III, John OMIgranted 2018-04-24
All historical holders
Every license row we've seen with the callsign WA8ZFD, oldest first.
- Dellinger III, John O MI2007-07-12 → cancelled 2008-07-19
- Ingalsbe, Caleb D MI2020-10-22 active