Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0TPM callsign genealogy
Currently held by Petersen, John L
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 K0TPM's current licensee, walking backwards.
- Petersen, John LWVgranted 2007-11-07cancelled 2007-12-04
Successor callsigns
Callsigns held now by people who previously held K0TPM.
- Petersen, John LWVgranted 2007-12-04cancelled 2012-05-08