Postal code 18-421 is mapped to 43 locality records in Poland with administrative hierarchy and coordinates.
Based on 43 records, 1 postal code values and 43 mapped localities. Coordinate coverage is 100.0%.
| Postal code | Locality | Administrative path | Coordinates |
|---|---|---|---|
| 18-421 | Budy Czarnockie | Podlasie / Łomża County / Gmina Piątnica | 53.2243, 22.1194 |
| 18-421 | Budy-Mikołajka | Podlasie / Łomża County / Gmina Piątnica | 53.255, 22.1722 |
| 18-421 | Choszczewo | Podlasie / Łomża County / Gmina Piątnica | 53.2369, 22.2797 |
| 18-421 | Czarnocin | Podlasie / Łomża County / Gmina Piątnica | 53.2149, 22.0772 |
| 18-421 | Dobrzyjałowo | Podlasie / Łomża County / Gmina Piątnica | 53.2709, 22.191 |
| 18-421 | Drozdowo | Podlasie / Łomża County / Gmina Piątnica | 53.1554, 22.1728 |
This code belongs to the 18 prefix range for Poland.
View all 18 postal codesTreat 18-421 as a text value, not a number. Postal identifiers can contain leading zeroes, spaces or letters in other countries, so applications should validate the country and original string together. For this page, the code is valid when it appears with one of the mapped localities below and the administrative path belongs to Poland.
A postal code can map to more than one locality record, and the same locality name can appear in different administrative areas. Always compare the country, postal code, place name and region together before treating a match as final.
Coordinates on this page are useful for map previews and approximate area checks. They should be read as locality or postal-area centroids, not as exact delivery addresses. For bulk validation, download the country dataset and keep this canonical URL as the human-readable reference for the code.
These neighboring identifiers help compare adjacent code ranges inside Poland. Each link opens a canonical postal-code page with its mapped places and administrative context.