Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N3OIC callsign genealogy
Currently held by DAWSON, WILLIAM D
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 N3OIC's current licensee, walking backwards.
- Santiago, Robert RPAgranted 2015-10-20cancelled 2015-11-10
Successor callsigns
Callsigns held now by people who previously held N3OIC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N3OIC, oldest first.
- DAWSON, WILLIAM D PA2002-11-25 → cancelled 2015-02-24
- Santiago, Robert R PA2025-11-25 active