Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KE4EIF callsign genealogy
Currently held by JOHNSON, CHRISTOPHER M
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 KE4EIF's current licensee, walking backwards.
- Johnson, Christopher MARgranted 2023-01-19cancelled 2023-03-13
Successor callsigns
Callsigns held now by people who previously held KE4EIF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KE4EIF, oldest first.
- JOHNSON, CHRISTOPHER M AR2004-08-19 → cancelled 2016-08-20
- Johnson, Christopher M AR2023-03-13 active