Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4MLO callsign genealogy
Currently held by MANSFIELD JR, JAMES N
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 K4MLO's current licensee, walking backwards.
- Varnadoe, Milo NGAgranted 2015-12-16cancelled 2016-09-27
Successor callsigns
Callsigns held now by people who previously held K4MLO.
- OLSON, MARTIN LGAgranted 2021-10-20
All historical holders
Every license row we've seen with the callsign K4MLO, oldest first.
- MANSFIELD JR, JAMES N TN1997-09-09 → cancelled 2009-09-10
- OLSON, MARTIN L GA2011-11-11 → cancelled 2011-12-20
- Varnadoe, Milo N GA2016-09-27 active