Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9CEO callsign genealogy
Currently held by Sullivan, Penelope 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 K9CEO's current licensee, walking backwards.
- Sullivan, Penelope GNYgranted 2010-10-29cancelled 2011-06-11
Successor callsigns
Callsigns held now by people who previously held K9CEO.
No current licensee on record previously held this callsign.