Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NB1Y callsign genealogy
Currently held by Fritz, Marshall H
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 NB1Y's current licensee, walking backwards.
- Fritz, Marshall HCTgranted 2015-01-13cancelled 2017-07-15
Successor callsigns
Callsigns held now by people who previously held NB1Y.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NB1Y, oldest first.
- NELSEN, DONALD E MA2005-03-30 → cancelled 2017-06-27
- Fritz, Marshall H CT2017-07-15 active