is_multicast

Checks whether an IP address is a multicast address.

is_multicast(x:ip) -> bool

Description

The is_multicast function checks whether a given IP address x is a multicast address.

For IPv4, multicast addresses are in the range 224.0.0.0 to 239.255.255.255 (224.0.0.0/4).

For IPv6, multicast addresses start with the prefix ff00::/8.

from {
  ipv4_multicast: 224.0.0.1.is_multicast(),
  ipv6_multicast: ff02::1.is_multicast(),
  not_multicast: 8.8.8.8.is_multicast(),
}

{
  ipv4_multicast: true,
  ipv6_multicast: true,
  not_multicast: false,
}