Loopback Addresses, Always your computer
127.x.x.x
Private IP Addresses, Computers on your local network
10.x.x.x
172.16.0.0 -172.31.255.255
192.168.x.x
169.254.x.x (link local, used if your network has no DHCP server)
Multicast, Addresses multiple computers on your local network
224.0.0.0 - 239.255.255.255
Broadcast, Addresses all computers on your local network
255.255.255.255
CGNAT Addresses, Computers on your same ISP/carrier
100.64.0.0 - 100.127.255.255
(Only applicable if your ISP/carrier uses CGNAT)
Public Internet Addresses Most other IP addresses
Which block of private IPs your local network uses depends on how your router/DHCP server is configured. If you’re using the standard router your ISP provided then whatever default settings on that will determine your local subnet.
Does each provider have their own? Most of the ones I’ve had your local network was 192.168.0.1, but my recent one is 10.0.0.1.
It’s all just modem access I’m guessing in the end and they can choose mostly what they want?
No, 127.0.0.1 is the loop back, so it doesn’t even leave the machine and doesn’t need to be connected to any network.
Those are non-routed IP blocks. 127.0.0.1 is the machine you’re on, the localhost.
Loopback Addresses, Always your computer
127.x.x.x
Private IP Addresses, Computers on your local network
10.x.x.x
172.16.0.0 -172.31.255.255
192.168.x.x
169.254.x.x (link local, used if your network has no DHCP server)
Multicast, Addresses multiple computers on your local network
224.0.0.0 - 239.255.255.255
Broadcast, Addresses all computers on your local network
255.255.255.255
CGNAT Addresses, Computers on your same ISP/carrier
100.64.0.0 - 100.127.255.255
(Only applicable if your ISP/carrier uses CGNAT)
Public Internet Addresses
Most other IP addresses
Which block of private IPs your local network uses depends on how your router/DHCP server is configured. If you’re using the standard router your ISP provided then whatever default settings on that will determine your local subnet.