Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1UM callsign genealogy
Currently held by ALLEN, DAN H
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 N1UM's current licensee, walking backwards.
- Hartmann, Glen PMAgranted 2023-10-05cancelled 2025-05-28
Successor callsigns
Callsigns held now by people who previously held N1UM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1UM, oldest first.
- ALLEN, DAN H NH2013-04-16 → cancelled 2025-05-07
- Hartmann, Glen P MA2025-05-28 active