Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4TOO callsign genealogy
Currently held by Curtland, Andrew J
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 N4TOO's current licensee, walking backwards.
- Curtland, Andrew JWAgranted 2016-09-22cancelled 2016-10-14
Successor callsigns
Callsigns held now by people who previously held N4TOO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4TOO, oldest first.
- HAWTHORN, SAMUEL H FL1998-06-23 → cancelled 2010-06-24
- Curtland, Andrew J WA2016-10-14 active