Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SFP callsign genealogy
Currently held by Papworth, Allan R
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 K4SFP's current licensee, walking backwards.
- Papworth, Allan RFLgranted 2007-11-06cancelled 2010-10-30
Successor callsigns
Callsigns held now by people who previously held K4SFP.
No current licensee on record previously held this callsign.