The IP address 192.168.51.136 : Class C Networks
Secure IP address This IP is only local, it is not accessible from outside the network
Rating: 5
This means that the IP address is not accessible from the Internet, it is local and only accessible within the network. Everyone has the same local address (192.168.0.0 - 192.168.255.255).
Each device (laptop, printer, scanner, phone, surveillance camera, tablet, ...) has a unique local IP address assigned by the adsl box that allows the box to identify the different devices to within a local network and send the right product at the right flow.
Specifically, the adsl box has a public IP address in your case, which connects to the Internet and the box assigns a local address to all devices to identify them.
The IP address 192.168.51.136 detail
The IP address 192.168.51.136 (IPv4 Class C Networks) belonging to the network 192.168.0.0 - 192.168.255.255 is written in long version -1062718584.
Color obtained mathematically from the IP address: Camel
Addresses on the same network : 192.168.51.0 192.168.51.1 192.168.51.2 192.168.51.3 192.168.51.4 192.168.51.5 192.168.51.6 192.168.51.7 192.168.51.8 192.168.51.9 192.168.51.10 192.168.51.20 192.168.51.30 192.168.51.40 192.168.51.50 192.168.51.60 192.168.51.70 192.168.51.80 192.168.51.90 192.168.51.100 192.168.51.200 192.168.51.254 192.168.51.255