Postal code 42-400 – Zawiercie
Zawiercie, Zawiercie municipality, zawierciański county, śląskie voivodeship
- locality
- 1
- streets
- 410
- buildings
- 8,007
Postal code 42-400 is used in Zawiercie (Zawiercie municipality, zawierciański county, śląskie voivodeship). It covers 8007 buildings on 410 streets – the full list with house numbers is below.
Which streets have postal code 42-400?
How to address a letter or parcel in Poland?
Jan Kowalski ul. 11 Listopada 1 42-400 Zawiercie
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 42-400 cover?
Postal code 42-400 covers Zawiercie, including streets: 11 Listopada, 3 Maja, Adama Asnyka, Adama Mickiewicza, Aleksandry Billewiczówny (zawierciański county, śląskie voivodeship).
Where is postal code 42-400?
In śląskie voivodeship, zawierciański county, Poland.
Is postal code 42-400 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 42-400?
Which municipality and county does 42-400 belong to?
The 42-400 area (Zawiercie) lies in Zawiercie municipality (gmina), in zawierciański county (powiat), śląskie voivodeship, Poland. Centre of the area based on address points: 50.4946, 19.4165.
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

