Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KB7OZN callsign genealogy
Currently held by DUTTON SR, WILLIAM L
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 KB7OZN's current licensee, walking backwards.
- DUTTON SR, WILLIAM LMDgranted 2019-11-04cancelled 2019-11-23
Successor callsigns
Callsigns held now by people who previously held KB7OZN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB7OZN, oldest first.
- DUTTON, ALBERT J NV1992-09-08 → cancelled 2004-09-09
- DUTTON SR, WILLIAM L MD2019-11-23 active