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255.255.255.255/32

255.255.255.255 is the limited broadcast address

Last updated 26 Oct 2026 from the IANA IPv4 Special-Purpose Address Registry

Short answer

255.255.255.255 is the limited broadcast address: every device on the local network, never routed beyond it.

Block255.255.255.255/32
First – last255.255.255.255 – 255.255.255.255
Size1 addresses
Name in the registryLimited Broadcast
Defined inRFC 8190; RFC 919, Section 7
Allocated1984-10
Valid as source / destinationFalse / True
ForwardableFalse
Globally reachableFalse

What it means

RFC 919 and RFC 8190 define it as the broadcast address. A device sends to it to reach every host on its own link, for example when asking for an address over DHCP.

Routers never forward it to the internet.

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Sources

  1. IANA IPv4 Special-Purpose Address Registry (CC0) · checked 26 Oct 2026
  2. RFC 8190; RFC 919