Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KN4SPS 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 KN4SPS's current licensee, walking backwards.
- SULLIVAN SR, STEPHEN PSCgranted 2018-07-13cancelled 2018-07-31
Successor callsigns
Callsigns held now by people who previously held KN4SPS.
- SULLIVAN SR, STEPHEN PSCgranted 2019-12-06