Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N0PAY callsign genealogy
Currently held by KLAUS, ROBERT J
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 N0PAY's current licensee, walking backwards.
- Rainey, Joseph DAZgranted 2020-11-12cancelled 2020-12-01
Successor callsigns
Callsigns held now by people who previously held N0PAY.
- KLAUS, ROBERT JIAgranted 2023-09-22
All historical holders
Every license row we've seen with the callsign N0PAY, oldest first.
- TROSDAHL, STEVEN W IA2001-06-20 → cancelled 2013-09-18
- KLAUS, ROBERT J IA2013-11-19 → cancelled 2013-12-13
- Rainey, Joseph D AZ2020-12-01 active