Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6NB callsign genealogy
Currently held by BIRO, EDWARD
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 K6NB's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K6NB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6NB, oldest first.
- BIRO, EDWARD CA1988-09-13 → cancelled 2000-09-14
- SAN MATEO UHF ASSOCIATION CA2020-09-24 active