Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA1TDN callsign genealogy
Currently held by JOHNSON, DALE M
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 KA1TDN's current licensee, walking backwards.
- Clough, Lawrence RMEgranted 2010-07-22cancelled 2017-08-11
Successor callsigns
Callsigns held now by people who previously held KA1TDN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA1TDN, oldest first.
- JOHNSON, DALE M MA1990-10-09 → cancelled 2002-10-10
- Clough, Lawrence R ME2017-08-11 active