Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1JPM callsign genealogy
Currently held by GRIGGS III, HAROLD V
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 N1JPM's current licensee, walking backwards.
- MALDONADO, JESUS PCTgranted 2019-02-22cancelled 2019-03-12
Successor callsigns
Callsigns held now by people who previously held N1JPM.
- GRIGGS III, HAROLD VNYgranted 2023-09-07
All historical holders
Every license row we've seen with the callsign N1JPM, oldest first.
- GRIGGS III, HAROLD V NY2011-04-22 → cancelled 2013-09-13
- MALDONADO, JESUS P CT2019-03-12 active