Confidence: Medium · Source: FCC ULS · As of 2026-09-09
W4HKO callsign genealogy
Currently held by OTSTOT, HAROLD K
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 W4HKO's current licensee, walking backwards.
- OTSTOT, HAROLD KFLgranted 2002-03-06cancelled 2002-09-10
Successor callsigns
Callsigns held now by people who previously held W4HKO.
No current licensee on record previously held this callsign.