Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1JBB callsign genealogy
Currently held by Block, John B
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 K1JBB's current licensee, walking backwards.
- Block, John BARgranted 2004-06-22cancelled 2004-09-03
Successor callsigns
Callsigns held now by people who previously held K1JBB.
No current licensee on record previously held this callsign.