IPv4 address format
An IPv4 address contains four decimal octets, such as 203.0.113.42.
Public and private IPv4
Public IPv4 addresses are used on the public internet; private ranges are intended for internal networks.
Why IPv4 is limited
IPv4 provides roughly 4.3 billion possible addresses, which became scarce as internet-connected devices grew.
Live network results can depend on your connection and third-party data providers.