Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1TWC callsign genealogy
Currently held by COLVIN, TODD W
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 W1TWC's current licensee, walking backwards.
- COLVIN, TODD WNYgranted 2013-02-20cancelled 2017-07-25
Successor callsigns
Callsigns held now by people who previously held W1TWC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1TWC, oldest first.
- CARTER, TODD W MI2001-10-20 → cancelled 2013-11-05
- COLVIN, TODD W NY2017-07-25 active