Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NF4R callsign genealogy
Currently held by Blackburn, Jeffrey 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 NF4R's current licensee, walking backwards.
- Blackburn, Jeffrey SKYgranted 2020-06-23cancelled 2021-04-17
Successor callsigns
Callsigns held now by people who previously held NF4R.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NF4R, oldest first.
- HATHAWAY SR, DAVID A KY2017-11-06 → cancelled 2019-03-29
- Blackburn, Jeffrey S KY2021-04-17 active