Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB3JMK callsign genealogy
Currently held by Schadt, Warren W
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 KB3JMK's current licensee, walking backwards.
- Ransom, Paula RPAgranted 2018-06-08cancelled 2019-09-10
Successor callsigns
Callsigns held now by people who previously held KB3JMK.
- Schadt, Warren WMDgranted 2013-02-22cancelled 2025-05-14
All historical holders
Every license row we've seen with the callsign KB3JMK, oldest first.
- Schadt, Warren W MD2003-04-15 → cancelled 2003-05-13
- Ransom, Paula R PA2019-09-10 active