Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9ERP callsign genealogy
Currently held by HOLUB JR, SIDNEY F
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 W9ERP's current licensee, walking backwards.
- HOLUB JR, SIDNEY FWIgranted 1998-04-14cancelled 2007-11-06
Successor callsigns
Callsigns held now by people who previously held W9ERP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9ERP, oldest first.
- RITTENHOUSE, FLOYD R IN1994-03-22 → cancelled 2006-03-23
- HOLUB JR, SIDNEY F WI2017-08-29 active