Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3RTB callsign genealogy
Currently held by Callender, David W
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 W3RTB's current licensee, walking backwards.
- Callender, David WTNgranted 2020-06-15cancelled 2020-07-07
Successor callsigns
Callsigns held now by people who previously held W3RTB.
No current licensee on record previously held this callsign.