This PostgreSQL module provides several data types which can contain single IPv4 or IPv6 addresses or a range of such addresses.

ip4r supports these data types:

ip4: IPv4 address '#.#.#.#'
ip4r: IPv4 range '#.#.#.#-#.#.#.#' or '#.#.#.#/#' or '#.#.#.#'
ip6: IPv6 address 'xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx'
ip6r: IPv6 range '#-#' or '#/#' or '#'
ipaddress: IPv4 or IPv6 address
iprange: IPv4 or IPv6 range
While PostgreSQL already has built-in types 'inet' and 'cidr', the authors of this module found that they had a number of requirements that were not addressed by the built-in types.