Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB7ZMD callsign genealogy
Currently held by HARTLEY, 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 KB7ZMD's current licensee, walking backwards.
- HARTLEY, JOHN DLAgranted 2017-05-11cancelled 2017-06-09
Successor callsigns
Callsigns held now by people who previously held KB7ZMD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB7ZMD, oldest first.
- HARTLEY, JOHN D AZ1993-11-09 → cancelled 2005-11-10
- HARTLEY, JOHN D LA2017-06-09 active