Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N1OOH callsign genealogy
Currently held by LAWRENCE, MICHAEL 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 N1OOH's current licensee, walking backwards.
- Lawrence, Michael RMAgranted 2016-09-20cancelled 2016-10-08
Successor callsigns
Callsigns held now by people who previously held N1OOH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1OOH, oldest first.
- LAWRENCE, MICHAEL R MA1993-03-02 → cancelled 2005-03-03
- Lawrence, Michael R MA2026-08-27 active