Confidence: Medium · Source: FCC ULS · As of 2026-09-12
ND3O callsign genealogy
Currently held by MC DONALD JR, JASPER R
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 ND3O's current licensee, walking backwards.
- Colegrove, Dennis APAgranted 2012-11-15cancelled 2016-04-01
Successor callsigns
Callsigns held now by people who previously held ND3O.
- ROBERTS, DARIN LIDgranted 2023-12-05
All historical holders
Every license row we've seen with the callsign ND3O, oldest first.
- MC DONALD JR, JASPER R PA1996-06-12 → cancelled 2008-06-13
- ROBERTS, DARIN L ID2013-08-06 → cancelled 2014-02-28
- Colegrove, Dennis A PA2026-02-28 active