Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4LSD callsign genealogy
Currently held by Sullivan, James P
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 N4LSD's current licensee, walking backwards.
- Sullivan Sr, James PGAgranted 2018-04-20cancelled 2021-03-12
Successor callsigns
Callsigns held now by people who previously held N4LSD.
No current licensee on record previously held this callsign.