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functions cidrhost - Functions - Configuration Language docs-funcs-ipnet-cidrhost The cidrhost function calculates a full host IP address within a given IP network address prefix.

cidrhost Function

cidrhost calculates a full host IP address for a given host number within a given IP network address prefix.

cidrhost(prefix, hostnum)

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

hostnum is a whole number that can be represented as a binary integer with no more than the number of digits remaining in the address after the given prefix.

This function accepts both IPv6 and IPv4 prefixes, and the result always uses the same addressing scheme as the given prefix.

Examples

> cidrhost("10.12.127.0/20", 16)
10.12.112.16
> cidrhost("10.12.127.0/20", 268)
10.12.113.12
> cidrhost("fd00:fd12:3456:7890:00a2::/72", 34)
fd00:fd12:3456:7890::22

Related Functions

  • cidrsubnet calculates a subnet address under a given network address prefix.