Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K3MZO callsign genealogy
Currently held by Cahill, Patrick J
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 K3MZO's current licensee, walking backwards.
- Cahill, Patrick JPAgranted 2007-09-21cancelled 2007-10-23
Successor callsigns
Callsigns held now by people who previously held K3MZO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K3MZO, oldest first.
- CARVER SR, EMIL PA1993-11-30 → cancelled 2005-12-01
- Cahill, Patrick J PA2007-10-23 → cancelled 2019-10-24