Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3OFH callsign genealogy
Currently held by Heinz, John M
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 W3OFH's current licensee, walking backwards.
- Heinz, John MMDgranted 2005-09-08cancelled 2006-01-19
Successor callsigns
Callsigns held now by people who previously held W3OFH.
No current licensee on record previously held this callsign.