Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3CPO callsign genealogy
Currently held by Krysztoforski, Joseph T
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 W3CPO's current licensee, walking backwards.
- Baker, Jay RMDgranted 2014-12-15cancelled 2015-07-28
Successor callsigns
Callsigns held now by people who previously held W3CPO.
All historical holders
Every license row we've seen with the callsign W3CPO, oldest first.
- Krysztoforski, Joseph T MD2002-07-12 → cancelled 2002-10-05
- Young III, John P MD2011-11-01 → cancelled 2013-06-25
- Baker, Jay R MD2025-06-26 active