Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4TNP callsign genealogy
Currently held by MCMANUS, FREDERICK T
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 KM4TNP's current licensee, walking backwards.
- MCMANUS, FREDERICK TNCgranted 2016-04-01cancelled 2016-04-26
Successor callsigns
Callsigns held now by people who previously held KM4TNP.
- MCMANUS, FREDERICK TNCgranted 2026-05-14