The CIDR notation 0.0.0.0 / 0 defines an IP block containing all possible IP addresses. It is commonly used in routing to depict the default route as a destination subnet.

Jul 15, 2021 · A 0.0.0.0 address indicates the client isn't connected to a TCP/IP network, and a device may give itself a 0.0.0.0 address when it is offline. The five IPv4 address classes -- A, B, C, D and E …

Dec 26, 2025 · In network configuration, 0.0.0.0 is used to indicate “all IPv4 addresses on the local machine” or “any IPv4 address.” For example, a server listening on 0.0.0.0 is accessible on all …

The IP address 0.0.0.0 is a reserved address, not a public one. This means it cannot be used on the public internet and is instead set aside for a special purpose.

Dec 20, 2023 · The IP address 0.0.0.0 signifies different uses at different places. Usually, it's a non-routable meta address that's not bound to any particular remote address.

Jul 23, 2025 · The 0.0.0.0 DNS server is a placeholder address that mainly means "no specific address" or "invalid address" in certain network configurations. It is not a valid or usable IP address for actual …

Nov 12, 2025 · The 0.0.0.0 IP address is a special, non-routable address that represents the absence of a specific address, often used to indicate “any” or “all” IPv4 addresses on a device.

Mar 1, 2023 · When we see the IP address 0.0.0.0, it typically means that the device is not configured with a valid IP address or is not currently connected to a network. If we are trying to access a device …

May 29, 2017 · The default route in Internet Protocol Version 4 (IPv4) is designated as the zero-address 0.0.0.0/0 in CIDR notation, often called the quad-zero route. The subnet mask is given as /0, which …

0.0.0.0 is a reserved IPv4 address that is used as "this host on this network" and belongs to the class A subnet 0.0.0.0/8 (IPv4 address space 0.0.0.0-0.255.255.255) with 16,777,216 possible IP addresses.