[sodomak]

Usually here are two numbers for each address (there are even more specialized but it's not common): landmark - blue background and descriptive - red background (see [1]). "Blue" ones are better for orientation, they are in sequences, counted from 1, which start on the end of the street which is closer to some remarkable point in particular city (e.g. river at Prague). On one side of the street are odd numbers and on the other side are even numbers. Red ones are more "administrative" so they are not suitable for orientation. But at some smaller towns/villages or some parts of the cities are the only ones.

[1] https://cs.wikipedia.org/wiki/Ozna%C4%8Dov%C3%A1n%C3%AD_dom%...