Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9SDL callsign genealogy
Currently held by Lamb, James L
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 W9SDL's current licensee, walking backwards.
- Lamb, James LINgranted 2024-12-07cancelled 2025-01-28
Successor callsigns
Callsigns held now by people who previously held W9SDL.
No current licensee on record previously held this callsign.