Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4SPD callsign genealogy
Currently held by Alvarez, Rafael 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 N4SPD's current licensee, walking backwards.
- Alvarez, Rafael RTXgranted 2021-02-19cancelled 2021-03-13
Successor callsigns
Callsigns held now by people who previously held N4SPD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4SPD, oldest first.
- LAMB, BARBARA M GA2007-10-29 → cancelled 2020-01-07
- Alvarez, Rafael R TX2021-03-13 active