Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9APP callsign genealogy
Currently held by PARTLOW, AARON P
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 K9APP's current licensee, walking backwards.
- Blake, Joshua DCOgranted 2020-11-13cancelled 2021-04-23
Successor callsigns
Callsigns held now by people who previously held K9APP.
- PARTLOW, AARON POKgranted 2018-07-28
All historical holders
Every license row we've seen with the callsign K9APP, oldest first.
- PARTLOW, AARON P NE2016-06-18 → cancelled 2018-07-28
- Blake, Joshua D CO2021-04-23 active