Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4MGR callsign genealogy
Currently held by Robertson, Matthew G
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 N4MGR's current licensee, walking backwards.
- Ray, PatrickTNgranted 2022-01-26cancelled 2022-04-01
Successor callsigns
Callsigns held now by people who previously held N4MGR.
- Robertson, Matthew GTXgranted 2019-07-23cancelled 2020-02-22
- Robertson, Matthew GTXgranted 2019-03-19cancelled 2019-05-24
- Robertson, Matthew GNCgranted 2015-11-28cancelled 2017-03-31
- Robertson, Matthew GNMgranted 2010-04-02cancelled 2010-07-20
All historical holders
Every license row we've seen with the callsign N4MGR, oldest first.
- Robertson, Matthew G NM2004-02-20 → cancelled 2010-04-02
- Robertson, Matthew G NC2014-05-02 → cancelled 2015-11-28
- Robertson, Matthew G TX2017-12-02 → cancelled 2019-03-19
- Robertson, Matthew G TX2019-05-24 → cancelled 2019-07-23
- Ray, Patrick TN2022-04-01 active