1. Is it possible to research without specifying criteria?

Yes, it is. Please press the button "start search" and you get the list of all companies listed.

2. Is it possible to research just by the criterion of postal code?

No, for a query it is necessary to define the region (postal code area).

3. Is it necessary to enter the postal code in a special format?

Yes, the postal code has to have five digits. Shorter postal codes have a zero at the beginning instead of a number.

4. Will the query be executed, if I just enter a part of the name of the city?

Yes.

5. Will the query be executed, if I just enter a part of the name of the company?

Yes.

6. Do I have to specify all criteria making my choice?

No, every single criterion can be used for a query without the choice of further criteria.