Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4IAS callsign genealogy
Currently held by Riggs 923, Robert O
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 K4IAS's current licensee, walking backwards.
- Riggs, Robert OALgranted 2004-07-27cancelled 2005-04-26
Successor callsigns
Callsigns held now by people who previously held K4IAS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4IAS, oldest first.
- DUNLEVY, MAX H FL1987-10-13 → cancelled 1999-10-14
- Riggs 923, Robert O FL2015-02-04 active