Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W2GBT callsign genealogy
Currently held by SICKINGER, WALTER J
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 W2GBT's current licensee, walking backwards.
- ODonnell II, James RCAgranted 2025-03-11cancelled 2025-03-29
Successor callsigns
Callsigns held now by people who previously held W2GBT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W2GBT, oldest first.
- SICKINGER, WALTER J NJ1996-08-05 → cancelled 2008-08-06
- ODonnell II, James R CA2025-03-29 active