Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4EIO callsign genealogy
Currently held by MCDONALD SR, DAVID 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 N4EIO's current licensee, walking backwards.
- MC DONALD SR, DAVID BTNgranted 1996-04-03cancelled 2001-03-16
Successor callsigns
Callsigns held now by people who previously held N4EIO.
No current licensee on record previously held this callsign.