Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N0CRT callsign genealogy
Currently held by AMDAHL, MARY J
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 N0CRT's current licensee, walking backwards.
- Hamble, Chris AMNgranted 2017-07-26cancelled 2017-09-08
Successor callsigns
Callsigns held now by people who previously held N0CRT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N0CRT, oldest first.
- AMDAHL, MARY J MN2004-04-08 → cancelled 2015-12-15
- Hamble, Chris A MN2017-09-08 active