Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KN4NUU callsign genealogy
Currently held by SULLIVAN SR, STEPHEN P
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 KN4NUU's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KN4NUU.
- SULLIVAN SR, STEPHEN PSCgranted 2018-07-31cancelled 2019-12-06