Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N0GRP callsign genealogy
Currently held by SULLIVAN, DAN 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 N0GRP's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held N0GRP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N0GRP, oldest first.
- SULLIVAN, DAN R MO2005-11-08 → cancelled 2017-11-04
- SULLIVAN, ROBERT D MO2020-08-25 active