Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0ISF callsign genealogy
Currently held by Mease, Mark 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 W0ISF's current licensee, walking backwards.
- Mease, Mark GIAgranted 2001-05-07cancelled 2008-07-01
Successor callsigns
Callsigns held now by people who previously held W0ISF.
No current licensee on record previously held this callsign.