Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4GRR callsign genealogy
Currently held by Murphy, Robert K
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 W4GRR's current licensee, walking backwards.
- Murphy, Robert KFLgranted 2018-08-09cancelled 2024-07-23
Successor callsigns
Callsigns held now by people who previously held W4GRR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4GRR, oldest first.
- WEINERMAN, IRVIN FL2003-04-01 → cancelled 2015-06-02
- Murphy, Robert K FL2024-07-23 active