Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA6PM callsign genealogy
Currently held by COSTANZA, THOMAS A
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 AA6PM's current licensee, walking backwards.
- Melhus, Peter JCAgranted 2018-06-06cancelled 2019-02-01
Successor callsigns
Callsigns held now by people who previously held AA6PM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA6PM, oldest first.
- COSTANZA, THOMAS A CA1999-01-28 → cancelled 2011-01-29
- Melhus, Peter J CA2019-02-01 active