Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N3MED callsign genealogy
Currently held by Geisinger, Michael
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 N3MED's current licensee, walking backwards.
- Geisinger, MichaelPAgranted 2024-06-26cancelled 2025-07-18
Successor callsigns
Callsigns held now by people who previously held N3MED.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N3MED, oldest first.
- KROFICK, CATHERINE M PA2013-01-07 → cancelled 2024-06-07
- Geisinger, Michael PA2025-07-18 active