Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1AMO callsign genealogy
Currently held by KATZ, JACOB J
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 K1AMO's current licensee, walking backwards.
- MASEBERG, JACK WKSgranted 2012-04-04cancelled 2012-04-24
Successor callsigns
Callsigns held now by people who previously held K1AMO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1AMO, oldest first.
- KATZ, JACOB J CT1998-01-30 → cancelled 2010-02-02
- MASEBERG, JACK W KS2022-03-01 active