Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WW4MM callsign genealogy
Currently held by WARRINGTON, DAVID 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 WW4MM's current licensee, walking backwards.
- Meredith, DarrellFLgranted 2013-11-13cancelled 2014-01-07
Successor callsigns
Callsigns held now by people who previously held WW4MM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WW4MM, oldest first.
- WARRINGTON, DAVID J WY1998-07-15 → cancelled 2010-07-16
- Meredith, Darrell AZ2014-01-07 → cancelled 2026-03-07