Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB9NAL callsign genealogy
Currently held by Offerdahl, Eric 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 KB9NAL's current licensee, walking backwards.
- Offerdahl, Eric JWIgranted 2024-09-17cancelled 2024-10-08
Successor callsigns
Callsigns held now by people who previously held KB9NAL.
- Offerdahl, Eric JWIgranted 2025-03-08
All historical holders
Every license row we've seen with the callsign KB9NAL, oldest first.
- OFFERDAHL, ERIC J WI2006-04-19 → cancelled 2018-04-20
- Offerdahl, Eric J WI2024-10-08 → cancelled 2025-03-08