Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W2SP callsign genealogy
Currently held by FRENZEL, JOHN C
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 W2SP's current licensee, walking backwards.
- FRENZEL, JOHN CTXgranted 1997-10-28cancelled 2000-06-03
Successor callsigns
Callsigns held now by people who previously held W2SP.
- FEARMAN, ROY KILgranted 2018-04-10
All historical holders
Every license row we've seen with the callsign W2SP, oldest first.
- FRENZEL, JOHN C TX2020-03-18 active
- —— → cancelled 1998-05-06