Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1NCO callsign genealogy
Currently held by Tomlin, Christopher 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 W1NCO's current licensee, walking backwards.
- Tomlin, Christopher JNJgranted 2018-05-09cancelled 2020-10-17
Successor callsigns
Callsigns held now by people who previously held W1NCO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1NCO, oldest first.
- Sibel, John E MA1996-06-29 → cancelled 2008-07-01
- Tomlin, Christopher J NJ2020-10-17 active