Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AI4JH callsign genealogy
Currently held by HAEFNER, JOHN W
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 AI4JH's current licensee, walking backwards.
- HAEFNER, JOHN WVAgranted 2010-08-02cancelled 2011-10-04
Successor callsigns
Callsigns held now by people who previously held AI4JH.
All historical holders
Every license row we've seen with the callsign AI4JH, oldest first.
- PAYNE, JOHN P FL2006-02-11 → cancelled 2007-08-29
- HAEFNER, JOHN W VA2011-10-04 → cancelled 2011-10-29