Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N0SPF callsign genealogy
Currently held by Luther, Mark 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 N0SPF's current licensee, walking backwards.
- Luther, Mark AORgranted 2017-03-01cancelled 2017-03-28
Successor callsigns
Callsigns held now by people who previously held N0SPF.
- Luther, Mark AORgranted 2022-06-24
All historical holders
Every license row we've seen with the callsign N0SPF, oldest first.
- HAACK, LE ANN MN2002-02-26 → cancelled 2014-05-20
- Luther, Mark A OR2017-03-28 → cancelled 2022-06-24