Skip to main content

cidrnetmask Function

cidrnetmask converts an IPv4 address prefix given in CIDR notation into a subnet mask address.

Code Block

prefix must be given in IPv4 CIDR notation, as defined in RFC 4632 section 3.1.

The result is a subnet address formatted in the conventional dotted-decimal IPv4 address syntax, as expected by some software.

CIDR notation is the only valid notation for IPv6 addresses, so cidrnetmask produces an error if given an IPv6 address.


Code Block
> cidrnetmask("")