Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5LLK callsign genealogy
Currently held by ROSS JR, WILLIAM J B
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 K5LLK's current licensee, walking backwards.
- Koca, Lisa LTXgranted 2009-08-14cancelled 2009-09-09
Successor callsigns
Callsigns held now by people who previously held K5LLK.
- ROSS JR, WILLIAM J BTXgranted 2000-11-07cancelled 2012-11-08
All historical holders
Every license row we've seen with the callsign K5LLK, oldest first.
- ROSS JR, WILLIAM J B TX1992-02-11 → cancelled 2000-11-07
- Koca, Lisa L TX2019-09-18 active