Postal code 17-306 – Nowosiółki
Nowosiółki, Milejczyce municipality, siemiatycki county, podlaskie voivodeship
- localities
- 23
Postal code 17-306 is used in 23 localities, including Nowosiółki, Brzeziny-Janowięta, Brzeziny-Niedźwiadki, Chrościanka, Dołubowo (Milejczyce municipality, siemiatycki county, podlaskie voivodeship). It covers the whole locality, with no split by street.
Which localities have postal code 17-306?
How to address a letter or parcel in Poland?
Jan Kowalski Nowosiółki 15 17-306 Nowosiółki
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.
Frequently asked questions
What address does postal code 17-306 cover?
Postal code 17-306 covers 23 localities: Nowosiółki, Brzeziny-Janowięta, Brzeziny-Niedźwiadki, Chrościanka, Dołubowo, Dziadkowice, Hornowo, Hornowszczyzna, Jasienówka, Kąty and more (siemiatycki county, podlaskie voivodeship).
Where is postal code 17-306?
In podlaskie voivodeship, siemiatycki county, Poland.
Is postal code 17-306 enough to send a parcel?
No – always write the postal code together with the town or post office name and the full address (street and building number, or the village name with the house number).
Which postal codes are next to 17-306?
Which municipality and county does 17-306 belong to?
The 17-306 area (Nowosiółki) lies in Milejczyce municipality (gmina), in siemiatycki county (powiat), podlaskie voivodeship, Poland. Centre of the area based on address points: 52.5407, 23.1889.
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