Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA7MSR callsign genealogy
Currently held by Rowan, Michael S
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 WA7MSR's current licensee, walking backwards.
- Rowan, Michael SWAgranted 2019-11-21cancelled 2020-01-28
Successor callsigns
Callsigns held now by people who previously held WA7MSR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA7MSR, oldest first.
- YORK JR, WILLIAM B TX2007-04-21 → cancelled 2019-06-25
- Rowan, Michael S WA2020-01-28 active