Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1TCP callsign genealogy
Currently held by DIORIO, Chris J
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 K1TCP's current licensee, walking backwards.
- DIORIO, Chris JRIgranted 2017-11-22cancelled 2018-02-27
Successor callsigns
Callsigns held now by people who previously held K1TCP.
- GRIGSBY, BRYAN DGAgranted 2025-04-15
All historical holders
Every license row we've seen with the callsign K1TCP, oldest first.
- GRIGSBY, BRYAN D GA2012-10-30 → cancelled 2015-06-30
- DIORIO, Chris J RI2018-02-27 active