Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4CPM callsign genealogy
Currently held by Walther, James B
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 W4CPM's current licensee, walking backwards.
- Bauer, Matthew JNCgranted 2024-09-26cancelled 2024-10-16
Successor callsigns
Callsigns held now by people who previously held W4CPM.
- Walther, James BMOgranted 2017-01-18
All historical holders
Every license row we've seen with the callsign W4CPM, oldest first.
- Walther, James B KY2009-05-09 → cancelled 2017-01-18
- Bauer, Matthew J NC2024-10-16 active