Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1DDL callsign genealogy
Currently held by KEEHNER, WILLIAM F
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 W1DDL's current licensee, walking backwards.
- LANCASTER, DAVID DTNgranted 2024-12-05cancelled 2026-09-01
Successor callsigns
Callsigns held now by people who previously held W1DDL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1DDL, oldest first.
- KEEHNER, WILLIAM F CT2007-03-26 → cancelled 2019-05-29
- LANCASTER, DAVID D TN2026-09-01 active