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Postal code 18-421 – Piątnica Poduchowna

Piątnica Poduchowna, Piątnica municipality, łomżyński county, podlaskie voivodeship

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Code 18-421:
localities
44
streets
51
buildings
1,295

Postal code 18-421 is used in 44 localities, including Piątnica Poduchowna, Jeziorko, Dobrzyjałowo, Drozdowo, Olszyny (Piątnica municipality, łomżyński county, podlaskie voivodeship). It covers 1295 buildings on 51 streets – the full list with house numbers is below.

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Post office
Post offices in Piątnica Poduchowna – show branches on the map →
Location
44 localities
Piątnica municipality · łomżyński county
podlaskie voivodeship

Which streets have postal code 18-421?

ul. 33 Pułku Piechoty · Piątnica PoduchownaNumbers: 1–2, 2A, 4–10, 10A, 11–16, 18, 20, 22, 24, 26, 28ul. Cmentarna · Piątnica PoduchownaNumbers: 2–9ul. Czarnocka · Piątnica PoduchownaNumbers: 1–4, 4A, 5–6, 6A, 7–10, 10A, 11–13, 13A, 14–16, 16A, 16B, 17–18, 18A, 19–21, 21A, 22, 22A, 23–27, 27A, 28–30, 30A, 31, 31A, 31B, 31C, 32–37, 37A, 38–39, 39A, 40–42, 44–46, 46A, 47–49, 49A, 50–51, 51A, 52–55, 55A, 56–57, 57A, 58–59, 59A, 60–61, 63, 65, 67, 69, 69A, 71, 73, 77ul. Forteczna · Piątnica PoduchownaNumbers: 1–2, 2A, 3–10, 10A, 11–12, 12A, 12B, 13–30, 30A, 32, 34, 36ul. Jedwabieńska · Piątnica PoduchownaNumbers: 1A, 2–5, 5B, 6–7, 7A, 7B, 8–9, 9A, 10–15, 15A, 16–20, 20A, 21–23, 23A, 23B, 23D, 24–25, 25A, 25B, 26–27, 27A, 27B, 27C, 27D, 28, 28A, 29–31ul. Krótka · Piątnica PoduchownaNumbers: 1–5, 7, 9, 11, 11A, 13, 15, 17, 19ul. Księdza Kardynała Stefana Wyszyńskiego · Piątnica PoduchownaNumbers: 1, 1A, 2, 4–10, 12, 14, 16, 18ul. Łąkowa · Piątnica PoduchownaNumbers: 1–5, 7–8, 10ul. Nadrzeczna · Piątnica PoduchownaNumbers: 1–5, 5A, 6–18, 20ul. Nowa · Piątnica PoduchownaNumbers: 2, 5, 7–10, 12ul. Nowoprojektowana · Piątnica PoduchownaNumbers: 1, 1A, 1B, 2–6, 10ul. Ogrodowa · Piątnica PoduchownaNumbers: 1–2, 2A, 2C, 3–5, 7, 9–12, 12A, 13–14, 14A, 15–22, 23A, 23B, 24–27, 28A, 29, 29A, 30, 30A, 31, 31A, 31B, 32, 32A, 32B, 33–36, 36A, 37–38ul. Polna · Piątnica PoduchownaNumbers: 1–3, 3A, 4–5, 5A, 6–20, 22, 24, 26, 26A, 27, 27C, 27D, 28–30, 32, 34, 38ul. Północna · Piątnica PoduchownaNumbers: 1–2, 2A, 3–6, 8–12, 14ul. Promienna · Piątnica PoduchownaNumbers: 1, 1A, 2–3, 3A, 4–5, 5A, 6–7, 7A, 8–29ul. Sadowa · Piątnica PoduchownaNumbers: 1–5, 5A, 6, 6A, 7–8, 8A, 9–16, 18, 20, 22, 24, 26, 26A, 28, 30ul. Słoneczna · Piątnica PoduchownaNumbers: 1–4, 4A, 5–7ul. Stawiskowska · Piątnica PoduchownaNumbers: 1–3, 5–6, 6A, 7, 9, 9A, 10–18, 18A, 19, 21–28, 28A, 29–33, 35, 37–39, 39A, 39B, 41, 43, 45, 47, 47A, 49, 49A, 51, 51A, 53, 53A, 53B, 53C, 55, 57, 57A, 59, 59A, 59B, 61, 61A, 63, 65, 69, 69A, 71, 73, 73A, 73B, 75, 75A, 77ul. Szkolna · Piątnica PoduchownaNumbers: 1–3, 3A, 4–6, 6A, 7–10, 10A, 11–15, 15A, 16–31, 31A, 32–35, 114A, 126Aul. Wąska · Piątnica PoduchownaNumbers: 1–3, 3A, 4–5, 7, 9ul. Wesoła · Piątnica PoduchownaNumbers: 1–3, 3A, 4–7, 7A, 8–10, 10A, 11–13, 15ul. Zielona · Piątnica PoduchownaNumbers: 1–4, 4A, 5–11, 11A, 12–14, 14A, 15–20, 22ul. Akacjowa · JeziorkoNumbers: 13, 15ul. Brzozowa · JeziorkoNumbers: 2, 4, 6–8, 10–14, 16–21, 31ul. Chabrowa · JeziorkoNumbers: 4, 6, 8ul. Długa · JeziorkoNumbers: 5–7, 9–11, 13, 16, 19–52, 54–60, 62–64, 66, 68–70, 72–86, 88, 90, 92, 94, 96, 98, 100, 104, 106, 108, 110, 112, 114, 116, 118, 124, 126, 128, 130, 136, 140, 142, 142A, 144, 146, 148, 150, 152, 154, 156, 158, 160, 162, 164, 166, 170, 172ul. Grabowa · JeziorkoNumbers: 48ul. Jaśminowa · JeziorkoNumbers: 1–2, 4–7, 9, 11, 13, 15, 17ul. Lawendowa · JeziorkoNumbers: 2, 4, 6ul. Leśna · JeziorkoNumbers: 4–5, 11, 17, 19, 19A, 21, 27, 29, 33ul. Leszczynowa · JeziorkoNumbers: 5, 49, 51–52ul. Makowa · JeziorkoNumbers: 2, 4, 54, 101ul. Nowa · JeziorkoNumbers: 2, 4, 6, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 38, 42ul. Polna · JeziorkoNumbers: 1, 3, 5, 7, 9, 11, 35ul. Przemysłowa · JeziorkoNumbers: 1–2, 4–6, 10, 12, 14–18, 40, 40A, 40B, 40C, 40D, 40E, 42ul. Różana · JeziorkoNumbers: 1–6, 8–9, 12, 14–16, 18ul. Sosnowa · JeziorkoNumbers: 2–8, 10–11ul. Sportowa · JeziorkoNumbers: 2, 4, 6, 8, 10, 12, 14, 16, 19–20, 25, 27, 29–31, 33ul. Topolowa · JeziorkoNumbers: 2, 4, 6ul. Motycka · DobrzyjałowoNumbers: 5–11, 18ul. Zjazd · OlszynyNumbers: 1–15, 17, 19, 21, 23ul. Górkowska · DobrzyjałowoNumbers: 1–2, 2A, 3, 3A, 4, 4A, 4C, 5, 5A, 5B, 5C, 6–12ul. Jabłonna · DobrzyjałowoNumbers: 1–10, 10A, 11–19, 19A, 20–25, 25A, 26, 26A, 27–33, 33A, 34, 34A, 35–38, 40ul. Zdrojowa · DobrzyjałowoNumbers: 1–11, 11A, 12–31, 31A, 32–41, 41A, 42–48ul. Dolna · DrozdowoNumbers: 1, 1B, 2–3, 3A, 4–5, 5A, 6–7, 7A, 7B, 8–24, 26, 26A, 28, 30, 32, 34, 36, 38, 40, 40A, 42, 44, 46, 50, 52, 52A, 52B, 52C, 54, 54A, 56, 58, 60, 62, 62B, 64, 66ul. Główna · DrozdowoNumbers: 1–2, 2A, 2B, 2C, 3–9, 9A, 10, 10A, 10B, 11–13, 13A, 14–16, 16A, 16B, 16C, 17, 17A, 17B, 17C, 17D, 17E, 18–21, 21A, 23, 23A, 24, 24A, 25–27, 27B, 28–32, 34, 34A, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 54A, 56ul. Górna · DrozdowoNumbers: 1–2, 2A, 2B, 3–5, 5a, 6, 6A, 7–9, 9A, 9B, 10, 10A, 11–13, 13A, 14–16, 16A, 16E, 17–19, 21–23, 23A, 25, 27, 29ul. Kraska · DrozdowoNumbers: 2–4, 4A, 5–6, 6A, 6C, 7, 7A, 8–11, 11A, 11B, 12–14, 14A, 15–21, 21A, 22, 24, 24D, 26, 26A, 28, 30, 32, 34, 36, 36A, 36B, 38, 38A, 38B, 39–40, 40A, 42, 44, 46, 48, 50, 54ul. Krótka · OlszynyNumbers: 1–3, 4A, 5–7, 9ul. Wesoła · OlszynyNumbers: 1, 1A, 1B, 1C, 1D, 1E, 1F, 2, 2A, 3–4, 4B, 5, 5A, 6, 6A, 6B, 7–8, 8A, 9–12, 12A, 13–22, 22A, 23, 25, 27, 29, 31, 33, 35, 37, 39ul. Wiśniowa · OlszynyNumbers: 1–2, 2A, 3–18, 18A, 18B, 18C, 18D, 19, 19A, 21, 23–25, 27, 29, 31, 31A, 32–33, 35, 37–39, 41–43

Which localities have postal code 18-421?

Piątnica PoduchownaJeziorkoDobrzyjałowoDrozdowoOlszynyTaraskowoBudy CzarnockieDrożęcin-LubiejewoElżbiecinKalinowoKisielnicaKrzewoPiątnica WłościańskaRządkowoStary CydzynBudy-MikołajkaChoszczewoCzarnocinGórki-SypniewoGórki-SzewkowoGutyKałęczynKobylinKosakiKownatyMarianowoMotykaMurawyNagórkiNiewodowoNowe KrzewoNowy CydzynOlszyny-KoloniaPęzaPoniatRakowo-BoginieRakowo-CzachyStary DrożęcinTruszkiWiktorzynWyłudzinWyrzykiZabawkaŻelechy

How to address a letter or parcel in Poland?

Jan Kowalski
ul. 33 Pułku Piechoty 1
18-421 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 18-421 cover?

Postal code 18-421 covers 44 localities: Piątnica Poduchowna, Jeziorko, Dobrzyjałowo, Drozdowo, Olszyny, Taraskowo, Budy Czarnockie, Drożęcin-Lubiejewo, Elżbiecin, Kalinowo and more, including streets: 33 Pułku Piechoty, Cmentarna, Czarnocka, Forteczna, Jedwabieńska (łomżyński county, podlaskie voivodeship).

Where is postal code 18-421?

In podlaskie voivodeship, łomżyński county, Poland.

Is postal code 18-421 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 postal codes are next to 18-421?

18-41618-42018-42218-423

Which municipality and county does 18-421 belong to?

The 18-421 area (Piątnica Poduchowna) lies in Piątnica municipality (gmina), in łomżyński county (powiat), podlaskie voivodeship, Poland. Centre of the area based on address points: 53.2023, 22.0974.

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