Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N3HIO callsign genealogy
Currently held by UNDERWOOD, PATRICIA 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 N3HIO's current licensee, walking backwards.
- UNDERWOOD, PATRICIA JPAgranted 2014-09-13cancelled 2018-02-24
Successor callsigns
Callsigns held now by people who previously held N3HIO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N3HIO, oldest first.
- UNDERWOOD, WILLIAM PA2002-03-29 → cancelled 2014-06-03
- UNDERWOOD, PATRICIA J PA2018-02-24 active