Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AJ7DB callsign genealogy
Currently held by SCHROCK, JOHN 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 AJ7DB's current licensee, walking backwards.
- SCHROCK, JOHN DWAgranted 2024-11-02cancelled 2025-03-07
Successor callsigns
Callsigns held now by people who previously held AJ7DB.
- SCHROCK, JOHN DWAgranted 2026-01-17