(2018-04-03 BY BMADMIN — taken from the Brandmeister site)

As DMR made its debut in Amateur Radio, hams had to figure out which numerical identifier to use when programming DMR radios since there was no way to use alphanumerical callsigns. It was decided to use 7-digit numbers to identify radio operators; and to setup a public on-line database that provides the correspondance between the IDentifier and the amateur radio callsign.

It was further decided that the first 3 digits of the IDentifier would follow the Mobile Country Code numbering as defined in the ITU-T Recommendation E.212. This first 3 digits of the ID you are entering in your DMR radio are therefore identifying your geographical origin :

1 – Test networks
2 – Europe
3 – North America and the Caribbean
4 – Asia and the Middle East
5 – Oceania
6 – Africa
7 – South and Central America
9 – World-wide

BrandMeister is based on open-standards, which is a critical aspect of the network as it is open to third-party developers. It is therefore critical to stay consistent and follow standards.

We have noticed some users operating on the BrandMeister network with IDentifiers starting with 1. These numbers do not follow the MCC numbering standard and causes issues and confusion in third party systems with region-specific features.

While we have left those IDentifiers operating on the BrandMeister network for a while, we will have to restrict importing 1xx numbers starting May 1th 2018.

If you are using a DMR identifier that doesn’t follow the MCC numbering standard (i.e. starting with 1) and want to use the BrandMeister DMR network please make sure to request a correct ID before this deadline.