Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4JM callsign genealogy
Currently held by BILTCLIFFE, DONALD R
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 AI4JM's current licensee, walking backwards.
- BILTCLIFFE, DONALD RNCgranted 1997-08-13cancelled 2005-03-14
Successor callsigns
Callsigns held now by people who previously held AI4JM.
- BILTCLIFFE, DONALD RNCgranted 2015-02-12