Confidence: Medium · Source: FCC ULS · As of 2026-09-11
W4MPO callsign genealogy
Currently held by Harrison Sr, Jason R
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 W4MPO's current licensee, walking backwards.
- Harrison Sr, Jason RNCgranted 2020-07-14cancelled 2020-08-01
Successor callsigns
Callsigns held now by people who previously held W4MPO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4MPO, oldest first.
- OWENS, LOYD P AL1997-01-08 → cancelled 2009-01-10
- Harrison Sr, Jason R NC2020-08-01 active