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 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 …

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, 2013 · 0.0.0.0 has a couple of different meanings, but in this context, when a server is told to listen on 0.0.0.0 that means "listen on every available network interface".

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.

Oct 9, 2025 · 0.0.0.0 is a special IP address known as the “default route” or “unspecified address”. It is used to indicate that traffic should be sent to all interfaces on a machine, regardless of their …

Aug 25, 2024 · Ever found yourself puzzled by the IP address 0.0.0.0? I sure did. At first glance, it just looks like a bunch of zeros, but it’s way more important than it seems. In this article, I’ll...

Apr 24, 2025 · 0.0.0.0 is a special IP address. It doesn’t point to a single device. Instead, it means “all IPv4 addresses on the local machine.” When you set host="0.0.0.0", you are telling your program to …

May 6, 2025 · The 0.0.0.0 address is a special IP address that holds multiple meanings depending on the context in which it is used. Generally, it is best understood in three primary contexts: default …

Nov 30, 2022 · On Linux attempting to connect to 0.0.0.0 results in a connection to localhost (assuming something is listening). This seems in keeping with the RFC 1122 name. However I don't see it …