Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1LZL callsign genealogy
Currently held by BILLE, ANTHONY 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 W1LZL's current licensee, walking backwards.
- Holtgrefe, Joseph AMAgranted 2003-07-02cancelled 2005-05-17
Successor callsigns
Callsigns held now by people who previously held W1LZL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1LZL, oldest first.
- BILLE, ANTHONY M MA1994-11-09 → cancelled 1995-05-31
- Holtgrefe, Joseph A MA2025-03-15 active