Postal code for Siewna, Ciechanów - exact result

Siewna has 0 addresses.

Source: PRG - National Register of Boundaries (GUGiK, open data), EMUiA registry. Data is informational.

The information is provided for reference only. We do not guarantee that postal code or address data is complete, current, or error-free.

Data updated: 2026-07-11