Mac OS X in a Nutshell

Name

addr

Synopsis

addr [-4 | -6] { -n | -p } address
                  

Converts an IP address into both hexadecimal and dotted-decimal formats. The address is expected to be well-formed. An IPv4 address must be either 8 hexadecimal digits (with optional colons delimiting octets), or 4 dotted quads of decimal digits. An IPv6 address must be either 32 hexadecimal digits (with optional colons delimiting octets), or up to 4 octets of decimal or hexadecimal digits (delimited by dots or colons) preceded by a pair of colons and a possible prefix of several hexadecimal octets (e.g., ab:cd::12.34.56.78).

Options

-4

Specifies address as an IPv4 address. This is the default.

-6

Specifies address as an IPv6 address.

-n

Used when address is in hexadecimal format.

-p

Used when address is in dotted-decimal format, or abbreviated IPv6 format.