Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4RBB callsign genealogy
Currently held by Butler, Robert B
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 W4RBB's current licensee, walking backwards.
- BUTLER, ROBERT BGAgranted 1999-06-21cancelled 1999-10-26
Successor callsigns
Callsigns held now by people who previously held W4RBB.
No current licensee on record previously held this callsign.