0.0.0.0/32

0.0.0.0 on its own means “this host on this network”

Last updated 2 Nov 2026 from the IANA IPv4 Special-Purpose Address Registry

Short answer

0.0.0.0 on its own means “this host on this network”: a device with no address yet, or a program listening on every interface.

Block	0.0.0.0/32
First – last	0.0.0.0 – 0.0.0.0
Size	1 addresses
Name in the registry	This host on this network
Defined in	RFC 1122, Section 3.2.1.3
Allocated	1981-09
Valid as source / destination	True / False
Forwardable	False
Globally reachable	False

What it means

RFC 1122 lets a device use 0.0.0.0 as its source address while it is still asking for one (for example in a DHCP request). Server software also binds to 0.0.0.0 to mean “accept connections on every network interface”.

It is never the address of a website or a remote person.

What to do

If your device reports 0.0.0.0, it has no address: reconnect or restart the router.

Want the address websites actually see for you? Open the Truth Check.

Sources

IANA IPv4 Special-Purpose Address Registry (CC0) · checked 2 Nov 2026
RFC 1122