Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4SHM callsign genealogy
Currently held by GLATZER, DANA M
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 N4SHM's current licensee, walking backwards.
- Morgan, Sean HGAgranted 2005-11-17cancelled 2006-04-04
Successor callsigns
Callsigns held now by people who previously held N4SHM.
- Morgan, Sean HGAgranted 2016-08-02
All historical holders
Every license row we've seen with the callsign N4SHM, oldest first.
- GLATZER, DANA M GA1988-03-15 → cancelled 2000-03-16
- Morgan, Sean H GA2006-04-04 → cancelled 2006-09-02