Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1YPM callsign genealogy
Currently held by WILLIAMS, NEILL A
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 K1YPM's current licensee, walking backwards.
- Williams, Harrison CNHgranted 2020-10-03cancelled 2021-05-28
Successor callsigns
Callsigns held now by people who previously held K1YPM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1YPM, oldest first.
- WILLIAMS, NEILL A NH2015-12-22 → cancelled 2021-01-07
- Williams, Harrison C NH2021-05-28 active