Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W2KSW callsign genealogy
Currently held by HALPIN, LEO 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 W2KSW's current licensee, walking backwards.
- Halpin, Michael TNYgranted 2014-12-24cancelled 2015-04-21
Successor callsigns
Callsigns held now by people who previously held W2KSW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W2KSW, oldest first.
- HALPIN, LEO J FL2003-01-10 → cancelled 2015-03-10
- Halpin, Michael T NY2015-04-21 active