Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5OBO callsign genealogy
Currently held by MIKESELL, ALLEN G
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 K5OBO's current licensee, walking backwards.
- Shaffer, Robert STXgranted 2016-02-23cancelled 2016-03-22
Successor callsigns
Callsigns held now by people who previously held K5OBO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5OBO, oldest first.
- MIKESELL, ALLEN G TX1998-05-04 → cancelled 2010-05-05
- Shaffer, Robert S TX2026-03-13 active