The IP address 172.16.71.100 : Class B 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 (172.16.0.0 - 172.31.255.255).
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 172.16.71.100 detail
The IP address 172.16.71.100 (IPv4 Class B networks) belonging to the network 172.16.0.0 - 172.31.255.255 is written in long version -1408219292.
Color obtained mathematically from the IP address: Purplish red
Addresses on the same network : 172.16.71.0 172.16.71.1 172.16.71.2 172.16.71.3 172.16.71.4 172.16.71.5 172.16.71.6 172.16.71.7 172.16.71.8 172.16.71.9 172.16.71.10 172.16.71.20 172.16.71.30 172.16.71.40 172.16.71.50 172.16.71.60 172.16.71.70 172.16.71.80 172.16.71.90 172.16.71.200 172.16.71.254 172.16.71.255