Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9SDX callsign genealogy
Currently held by LAMB, GREGORY H
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 W9SDX's current licensee, walking backwards.
- KD9EJcancelledcancelled 1997-10-01
Successor callsigns
Callsigns held now by people who previously held W9SDX.
No current licensee on record previously held this callsign.