|Secondary house numbers known as "číslo orientační" in the Czech Republic.|
|Used on these elements|
|Status: de facto|
|Tools for this tag|
This key is accepted as a part of widely used address tagging system in Czechia and Slovakia.
Usage in Czechia
For instructions on tagging addresses in the Czech Republic see Czech address system(cs).
Usage in Slovakia
A page in Slovak documents the current practice in Slovakia.
One of the possible ways to tag a building with multiple entrances sharing the same conscription number: