Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KN4TWG callsign genealogy
Currently held by APONTE RIVERA, FERDINAND G
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 KN4TWG's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KN4TWG.
- APONTE RIVERA, FERDINAND GPRgranted 2017-07-07cancelled 2019-07-12