Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1ZPB callsign genealogy
Currently held by Congdon, Walton 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 W1ZPB's current licensee, walking backwards.
- Congdon, Charles WORgranted 2020-01-17cancelled 2020-02-08
Successor callsigns
Callsigns held now by people who previously held W1ZPB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1ZPB, oldest first.
- Congdon, Walton G MA2007-04-02 → cancelled 2019-07-02
- Congdon, Charles W OR2020-02-08 active