Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA9NP callsign genealogy
Currently held by PFIESTER SR, RITCHIE D
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 AA9NP's current licensee, walking backwards.
- KF9ZMno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held AA9NP.
- PFIESTER SR, RITCHIE DILgranted 2021-01-05