Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4TPM callsign genealogy
Currently held by Simms, Gregory 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 K4TPM's current licensee, walking backwards.
- Simms, Gregory SVAgranted 2015-06-17cancelled 2015-08-25
Successor callsigns
Callsigns held now by people who previously held K4TPM.
No current licensee on record previously held this callsign.