Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7ACH callsign genealogy
Currently held by Chan, Alfred S
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 W7ACH's current licensee, walking backwards.
- Chan, Alfred SWAgranted 2018-05-07cancelled 2018-05-30
Successor callsigns
Callsigns held now by people who previously held W7ACH.
- PANASUK, RICHARD JNYgranted 2004-08-03cancelled 2016-08-04
All historical holders
Every license row we've seen with the callsign W7ACH, oldest first.
- PANASUK, RICHARD J NY2004-06-11 → cancelled 2004-08-03
- Chan, Alfred S WA2018-05-30 active