Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7BTB callsign genealogy
Currently held by KRIDLER, RICHARD I
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 W7BTB's current licensee, walking backwards.
- KRIDLER, RICHARD IWAgranted 2002-05-08cancelled 2004-11-19
Successor callsigns
Callsigns held now by people who previously held W7BTB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7BTB, oldest first.
- KRIDLER, IRVIN D AZ1987-09-01 → cancelled 1999-09-02
- KRIDLER, RICHARD I WA2024-10-17 active