Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4CSI callsign genealogy
Currently held by Armfield, Robert M
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 W4CSI's current licensee, walking backwards.
- ARMFIELD, ROBERT MNCgranted 2002-04-24cancelled 2003-02-28
Successor callsigns
Callsigns held now by people who previously held W4CSI.
No current licensee on record previously held this callsign.