Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4OBY callsign genealogy
Currently held by SIPPRELL, RAYMOND F
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 W4OBY's current licensee, walking backwards.
- Sipprell, James ETNgranted 2007-08-14cancelled 2012-03-30
Successor callsigns
Callsigns held now by people who previously held W4OBY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4OBY, oldest first.
- SIPPRELL, RAYMOND F FL2005-10-20 → cancelled 2010-07-13
- Sipprell, James E MD2022-03-14 active