Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W6NCO callsign genealogy
Currently held by GUGGENHEIM, RICHARD W
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 W6NCO's current licensee, walking backwards.
- Spiewak, Jason ACAgranted 2015-01-05cancelled 2015-10-27
Successor callsigns
Callsigns held now by people who previously held W6NCO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6NCO, oldest first.
- GUGGENHEIM, RICHARD W CA2001-08-21 → cancelled 2013-10-16
- Spiewak, Jason A AE2025-08-12 active