class Host():
    @staticmethod
    def is_ipv6(value: str):
        return value.find(':') >= 0

    @staticmethod
    def is_ipv4(value: str):
        parts = value.split('.')

        if len(parts) > 4 or len(parts) == 0:
            return False

        for part in parts:
            if not part.isdecimal():
                return False

            num = int(part)

            if num > 255:
                return False

        return True

    @staticmethod
    def is_hostname(value: str):
        return not (Host.is_ipv6(value) and Host.is_ipv4(value))