Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AJ4YH callsign genealogy
Currently held by Zimmerman, Alan L
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 AJ4YH's current licensee, walking backwards.
- Zimmerman, Alan LGAgranted 2010-01-27cancelled 2010-04-13
Successor callsigns
Callsigns held now by people who previously held AJ4YH.
No current licensee on record previously held this callsign.