Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA1AM callsign genealogy
Currently held by ZAPOTOCKY JR, Darren P
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 WA1AM's current licensee, walking backwards.
- Krieger, Brian ECTgranted 2015-01-06cancelled 2016-01-15
Successor callsigns
Callsigns held now by people who previously held WA1AM.
- ZAPOTOCKY JR, Darren PCTgranted 2005-05-10cancelled 2011-07-08
All historical holders
Every license row we've seen with the callsign WA1AM, oldest first.
- ZAPOTOCKY JR, Darren P CT1999-08-03 → cancelled 2005-05-10
- Krieger, Brian E CT2025-11-25 active