Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD7PHX callsign genealogy
Currently held by Schaefer, Robert 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 KD7PHX's current licensee, walking backwards.
- Schaefer, Robert DAZgranted 2013-04-03cancelled 2013-04-30
Successor callsigns
Callsigns held now by people who previously held KD7PHX.
- Claver, Jennifer AAZgranted 2022-09-07
All historical holders
Every license row we've seen with the callsign KD7PHX, oldest first.
- Claver, Jennifer A AZ2001-12-18 → cancelled 2002-03-20
- Schaefer, Robert D AZ2013-04-30 → cancelled 2025-05-01