Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4IYB callsign genealogy
Currently held by BLANKENSHIP, RALPH E
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 K4IYB's current licensee, walking backwards.
- CRASS, LEONTNgranted 2015-10-28cancelled 2019-12-31
Successor callsigns
Callsigns held now by people who previously held K4IYB.
- CRASS, LEONINgranted 2023-11-10
All historical holders
Every license row we've seen with the callsign K4IYB, oldest first.
- BLANKENSHIP, RALPH E VA1987-12-01 → cancelled 1999-12-02
- CRASS, LEON IN2019-12-31 → cancelled 2023-11-10