Kossaki-Ostatki postal code
Village · zambrowski county (powiat) · Rutki municipality (gmina) · podlaskie voivodeship
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The postal code for Kossaki-Ostatki is 18-312.
Postal code – Kossaki-Ostatki
How to address a letter or parcel in Poland?
Jan Kowalski Kossaki-Ostatki 15 18-312 Kossaki-Ostatki
Write the postal code in the 00-000 format on the last line, before the town name. Put the recipient's full name on the first line and the street with building and flat number on the second. For mail from abroad, add POLAND as the final line. There are no named streets in Kossaki-Ostatki, so the second line contains the locality name and property number (e.g. Kossaki-Ostatki 15). If the serving post office is in another locality, its name can appear next to the code on the last line.
Frequently asked questions
How do I address a letter to Kossaki-Ostatki if it has no named streets?
Instead of a street, write the locality name and house number, e.g. “Kossaki-Ostatki 15”. On the last line, write the postal code 18-312 and the locality or post office name.
What is the postal code for Kossaki-Ostatki?
The postal code for Kossaki-Ostatki is 18-312.
Which voivodeship and county is Kossaki-Ostatki in?
Kossaki-Ostatki (village) is in zambrowski county (powiat), Rutki municipality (gmina), podlaskie voivodeship.
Which localities are closest to Kossaki-Ostatki?
The closest localities to Kossaki-Ostatki are: Kossaki Nadbielne (1 km), Kossaki-Falki (1.7 km), Wybrany (1.9 km), Kołomyja (2.2 km), Kałęczyn-Walochy (2.3 km), Kalinówka-Wielobory (2.5 km). Distances are measured in a straight line between locality centres.
Localities near Kossaki-Ostatki (zambrowski county)
Which county and municipality does Kossaki-Ostatki belong to?
Kossaki-Ostatki lies in Rutki municipality (gmina), in zambrowski county (powiat), podlaskie voivodeship, Poland. Centre of the area based on address points: 53.0945, 22.3521.
Where does this data come from?
Localities and postal codes come from the public TERYT registers (Statistics Poland), while streets, building numbers and locations come from the National Register of Boundaries (GUGiK). Data as of 12.11.2026. This site is not affiliated with Poczta Polska; for important shipments, confirm the code at a post office. More about sources