Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W2MJK callsign genealogy
Currently held by KEIFFER, MIKAEL
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 W2MJK's current licensee, walking backwards.
- KEIFFER, MIKAELOHgranted 2023-05-03cancelled 2023-05-23
Successor callsigns
Callsigns held now by people who previously held W2MJK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W2MJK, oldest first.
- Hathaway, William R NJ2005-02-25 → cancelled 2017-05-25
- KEIFFER, MIKAEL OH2023-05-23 active