Trętowo-Mazarnięta postal code
Settlement · ciechanowski county (powiat) · Opinogóra Górna municipality (gmina) · mazowieckie voivodeship
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The postal code for Trętowo-Mazarnięta is 06-406.
Postal code – Trętowo-Mazarnięta
How to address a letter or parcel in Poland?
Jan Kowalski Trętowo-Mazarnięta 15 06-406 Trętowo-Mazarnięta
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 Trętowo-Mazarnięta, so the second line contains the locality name and property number (e.g. Trętowo-Mazarnięta 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 Trętowo-Mazarnięta if it has no named streets?
Instead of a street, write the locality name and house number, e.g. “Trętowo-Mazarnięta 15”. On the last line, write the postal code 06-406 and the locality or post office name.
What is the postal code for Trętowo-Mazarnięta?
The postal code for Trętowo-Mazarnięta is 06-406.
Which voivodeship and county is Trętowo-Mazarnięta in?
Trętowo-Mazarnięta (settlement) is in ciechanowski county (powiat), Opinogóra Górna municipality (gmina), mazowieckie voivodeship.
Which localities are closest to Trętowo-Mazarnięta?
The closest localities to Trętowo-Mazarnięta are: Trętowo-Pełzy (0.5 km), Długołęka (1.5 km), Rembówko (1.5 km), Patory (1.8 km), Rembowo (1.9 km), Załuże-Imbrzyki (2 km). Distances are measured in a straight line between locality centres.
Localities near Trętowo-Mazarnięta (ciechanowski county)
Which county and municipality does Trętowo-Mazarnięta belong to?
Trętowo-Mazarnięta lies in Opinogóra Górna municipality (gmina), in ciechanowski county (powiat), mazowieckie voivodeship, Poland. Centre of the area based on address points: 52.9199, 20.7716.
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