Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9RTF callsign genealogy
Currently held by FORTHMAN, ROBERT T
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 W9RTF's current licensee, walking backwards.
- FORTHMAN, ROBERT TILgranted 2007-01-17cancelled 2014-02-14
Successor callsigns
Callsigns held now by people who previously held W9RTF.
No current licensee on record previously held this callsign.