Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1TNB callsign genealogy
Currently held by MacGregor, Matthew 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 W1TNB's current licensee, walking backwards.
- MacGregor, Matthew RCAgranted 2024-10-08cancelled 2024-11-02
Successor callsigns
Callsigns held now by people who previously held W1TNB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1TNB, oldest first.
- MacGregor, John AZ2008-09-12 → cancelled 2020-09-15
- MacGregor, Matthew R WA2024-11-02 active