network address
The first address of a subnet, with all host bits 0; it names the subnet itself.
The network address has every host bit set to 0 and names the subnet; it is not assigned to a device on ordinary subnets.
Examples
For the sensor at 192.168.1.37/24, setting the host bits to 0 gives the network address 192.168.1.0.
The first usable host on 192.168.1.0/24 is the network address plus 1, 192.168.1.1, here the router.
See also