Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1MLS callsign genealogy
Currently held by Spezia, Mark L
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 N1MLS's current licensee, walking backwards.
- Spezia, Mark LMEgranted 2025-04-12cancelled 2025-09-20
Successor callsigns
Callsigns held now by people who previously held N1MLS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1MLS, oldest first.
- MILLIGAN JR, RUSSELL H MA1992-05-19 → cancelled 2004-05-20
- Spezia, Mark L ME2025-09-20 active