Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N2SCI callsign genealogy
Currently held by SEIBERT, HOWARD 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 N2SCI's current licensee, walking backwards.
- KC2YOLcancelledMadSciGuys Amateur Radio AssociationNJgranted 2010-05-25cancelled 2010-06-19
Successor callsigns
Callsigns held now by people who previously held N2SCI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N2SCI, oldest first.
- SEIBERT, HOWARD J NJ1995-01-21 → cancelled 2006-04-20
- MadSciGuys Amateur Radio Association NY2020-07-07 active