Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AJ4TK 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 AJ4TK's current licensee, walking backwards.
- JOHNSON, CHRISTOPHER MFLgranted 2000-12-28cancelled 2009-10-20
Successor callsigns
Callsigns held now by people who previously held AJ4TK.
No current licensee on record previously held this callsign.