Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1TCO callsign genealogy
Currently held by Harding, Walter 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 K1TCO's current licensee, walking backwards.
- KB1ULXcancelledPilgrim Amateur Radio ClubMAgranted 2010-06-22cancelled 2010-07-13
Successor callsigns
Callsigns held now by people who previously held K1TCO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1TCO, oldest first.
- Harding, Walter R MA2005-07-01 → cancelled 2010-01-22
- Pilgrim Amateur Radio Club MA2010-07-13 → cancelled 2022-07-14