Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4XLR callsign genealogy
Currently held by TUTTLE, ROBERT S
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 K4XLR's current licensee, walking backwards.
- Oliver, Jeffrey DTNgranted 2016-02-10cancelled 2017-08-01
Successor callsigns
Callsigns held now by people who previously held K4XLR.
- TUTTLE, ROBERT SSCgranted 2021-04-09
All historical holders
Every license row we've seen with the callsign K4XLR, oldest first.
- TUTTLE, ROBERT S SC2010-03-06 → cancelled 2011-03-08
- Oliver 261, Jeffrey D TN2017-08-01 active