Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AA1ZA callsign genealogy
Currently held by CRITTENDON, DOUGLAS R
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 AA1ZA's current licensee, walking backwards.
- LAMPRECHT, FREDRICHTXgranted 2016-12-08cancelled 2016-12-28
Successor callsigns
Callsigns held now by people who previously held AA1ZA.
- CRITTENDON, DOUGLAS RMAgranted 2022-01-18
All historical holders
Every license row we've seen with the callsign AA1ZA, oldest first.
- CRITTENDON, DOUGLAS R MA2001-11-14 → cancelled 2002-03-07
- LAMPRECHT, FREDRICH TX2016-12-28 active