Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N8MAH callsign genealogy
Currently held by BIRKLE, ROGER 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 N8MAH's current licensee, walking backwards.
- Mah, Jeff RCAgranted 2013-03-22cancelled 2015-03-10
Successor callsigns
Callsigns held now by people who previously held N8MAH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N8MAH, oldest first.
- BIRKLE, ROGER A OH1999-07-28 → cancelled 2011-07-29
- Mah, Jeff R CA2025-01-28 active