Last updated April 20, 2020 by Zach
The 10-69 network is a custom Link Local network used by NYC Mesh for connecting between nodes.
Each Node ( actually, each router at a node ) will have an address from the subnet
10.69.0.0/16, using the last two octets for node identification, described below.
The 10-69 network should not appear in routing tables around the network, only the individual IPs, which indicates they are online.
The network can also be used as a ways to predicatively get to a specific node by node-number: Simply connect to that node’s 10-69 IP address.
Each Node can auto-generate its own 10-69 net number by the following method:
For the subnet
10.69.X.Y/16, we need to determine X and Y. Note X and Y are both 0-255, as this is an IPv4 address.
For node numbers up to 5 digits long, segment the lowest two digits (one and tens places) and place them in
Y. All other higher digits (hundreds, thousands, ten thousands) should be moved to
In other words, physically split the number into two segments.
|Node Number||X||Y||10-69-net Address|
Note that the maximum node number via this method is 25599.
Each Router at a Node ( often one router ) will need a different 10-69 address. To make things easy, we have optimized for the common case of one router, above.
The second most common case, of two routers, is just as easy.
100 to the Y value. All Y values between 100-199 are reserved for the Second router at a site.
|Node Number||X||Y||First router||Second Router|
|50000||X||Y||Not Possible||No Possible|