Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1DJB callsign genealogy
Currently held by COCO, JOHN 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 W1DJB's current licensee, walking backwards.
- Barrett, DylanCTgranted 2017-12-13cancelled 2018-01-03
Successor callsigns
Callsigns held now by people who previously held W1DJB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1DJB, oldest first.
- COCO, JOHN J MA2005-08-31 → cancelled 2017-11-29
- Barrett, Dylan J CT2018-01-03 active