Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4KM callsign genealogy
Currently held by Kostera IV, Thomas A
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 W4KM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W4KM.
- ANDERSON, DEXTERCTgranted 2013-01-15cancelled 2025-01-16
All historical holders
Every license row we've seen with the callsign W4KM, oldest first.
- ANDERSON, DEXTER CT2007-10-23 → cancelled 2013-01-15
- Kostera IV, Thomas A TN2025-03-18 active