Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3RML callsign genealogy
Currently held by Longo, Ross 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 W3RML's current licensee, walking backwards.
- Longo, Ross MPAgranted 2024-02-29cancelled 2025-02-14
Successor callsigns
Callsigns held now by people who previously held W3RML.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3RML, oldest first.
- CASTNER, ROBERT J PA1994-12-02 → cancelled 2006-12-05
- Longo, Ross M PA2025-02-14 active