Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WB3AAB callsign genealogy
Currently held by KLEM, WILLIAM R
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 WB3AAB's current licensee, walking backwards.
- Klem, William RPAgranted 2014-07-17cancelled 2014-08-26
Successor callsigns
Callsigns held now by people who previously held WB3AAB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB3AAB, oldest first.
- KLEM, WILLIAM R PA1988-04-05 → cancelled 2000-04-06
- Klem, William R PA2014-08-26 → cancelled 2026-08-29