Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1ATF callsign genealogy
Currently held by MAHAN, LLOYD 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 W1ATF's current licensee, walking backwards.
- Clark, Philip MMAgranted 2006-03-30cancelled 2014-07-11
Successor callsigns
Callsigns held now by people who previously held W1ATF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1ATF, oldest first.
- MAHAN, LLOYD J TX2002-03-29 → cancelled 2014-04-01
- Clark, Philip M MA2024-09-25 active