Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AJ4FY callsign genealogy
Currently held by Sullivan, T Mark
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 AJ4FY's current licensee, walking backwards.
- Sullivan, T MarkTNgranted 2007-03-21cancelled 2008-03-12
Successor callsigns
Callsigns held now by people who previously held AJ4FY.
No current licensee on record previously held this callsign.