Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4IOE callsign genealogy
Currently held by HENDRICKS, PHILLIP B
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 W4IOE's current licensee, walking backwards.
- HENDRICKS, SIDNEY RNCgranted 2001-04-23cancelled 2005-03-25
Successor callsigns
Callsigns held now by people who previously held W4IOE.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4IOE, oldest first.
- HENDRICKS, PHILLIP B NC2004-01-13 → cancelled 2005-02-27
- HENDRICKS, SIDNEY R NC2025-01-04 active