Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9PHD callsign genealogy
Currently held by MAERZ JR, RICHARD 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 N9PHD's current licensee, walking backwards.
- MAERZ JR, RICHARD HTXgranted 2024-05-25cancelled 2024-09-04
Successor callsigns
Callsigns held now by people who previously held N9PHD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9PHD, oldest first.
- TIDD, SCOTT P MO2012-05-07 → cancelled 2024-06-27
- MAERZ JR, RICHARD H TX2024-09-04 active