Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W2SDR callsign genealogy
Currently held by MAYER, FRANK S
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 W2SDR's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W2SDR.
No current licensee on record previously held this callsign.