Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC4LZ callsign genealogy
Currently held by Calbaugh jr., Walter E
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 AC4LZ's current licensee, walking backwards.
- Calbaugh, Walter ETNgranted 2015-12-17cancelled 2016-01-09
Successor callsigns
Callsigns held now by people who previously held AC4LZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AC4LZ, oldest first.
- CALBAUGH JR, WALTER E TN1991-12-03 → cancelled 2003-12-04
- Calbaugh jr., Walter E TN2016-01-09 active