Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W7OH callsign genealogy
Currently held by Callahan, Daniel 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 W7OH's current licensee, walking backwards.
- Callahan, Daniel GWAgranted 1997-05-12cancelled 2004-01-30
Successor callsigns
Callsigns held now by people who previously held W7OH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7OH, oldest first.
- OATFIELD, ROBERT F OR1994-07-09 → cancelled 1994-12-17
- Callahan, Daniel G WA2023-11-04 active