Most the NXDN systems here LCNs are numbered 1,2,3, etc.
I've been told by a friend that works on NXDN systems that if a place doesn't have any plans on multiple sites, or just a couple sites that do not use the same frequencies, then they will likely use a standard bandplan that would have numbers such as 401, 164, 323, etc.
However, for multiple sites, they like to just start off on Site 1 LCNs 1,2,3; Site 2 LCNs 4,5,6 and so on. The reasoning is that if the system has two sites that may have overlapping frequencies, then if the CC grants a TG to say channel 401 that radio only has 401 defined once which could only have one RAN assigned to it. Since from what I seen, the RAN follows the site number, so site 3 would have RAN 3. If two sites have LCN 401, the radio wouldn't have the capability to have two RANs programmed.