Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4ZIP callsign genealogy
Currently held by SHANKLES, CHARLES 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 N4ZIP's current licensee, walking backwards.
- Zipper, Neal RFLgranted 2014-02-24cancelled 2022-11-04
- KD4EGEno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held N4ZIP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4ZIP, oldest first.
- SHANKLES, CHARLES T TN2010-03-08 → cancelled 2022-06-07
- Zipper, Neal R FL2022-11-04 active