Postal code 12-421 – Piątnica Poduchowna
Piątnica Poduchowna, Piątnica municipality, łomżyński county, podlaskie voivodeship
- localities
- 7
- streets
- 3
- buildings
- 3
Postal code 12-421 is used in 7 localities, including Piątnica Poduchowna, Jeziorko, Taraskowo, Budy Czarnockie, Kisielnica (Piątnica municipality, łomżyński county, podlaskie voivodeship). It covers 3 buildings on 3 streets – the full list with house numbers is below.
Which streets have postal code 12-421?
Which localities have postal code 12-421?
How to address a letter or parcel in Poland?
Jan Kowalski ul. Promienna 1 12-421 Piątnica Poduchowna
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 12-421 cover?
Postal code 12-421 covers 7 localities: Piątnica Poduchowna, Jeziorko, Taraskowo, Budy Czarnockie, Kisielnica, Krzewo, Rządkowo, including streets: Promienna, Słoneczna, Leszczynowa (łomżyński county, podlaskie voivodeship).
Where is postal code 12-421?
In podlaskie voivodeship, łomżyński county, Poland.
Is postal code 12-421 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 municipality and county does 12-421 belong to?
The 12-421 area (Piątnica Poduchowna) lies in Piątnica municipality (gmina), in łomżyński county (powiat), podlaskie voivodeship, Poland. Centre of the area based on address points: 53.2086, 22.1006.
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