Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD4PMO callsign genealogy
Currently held by Grayson Jr, Peter M
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 WD4PMO's current licensee, walking backwards.
- Grayson Jr, Peter MALgranted 2021-05-18cancelled 2021-06-07
Successor callsigns
Callsigns held now by people who previously held WD4PMO.
No current licensee on record previously held this callsign.