@SK53 and @Russkel really answered this in the comments of the other proposed answer, but for clarity, the approximate explanation/answer is as follows: - Nominatim is based on the OSM data - OSM Post Code data is largely incomplete - The current status of Post Code data can be viewed on the [OSM TagInfo][1] website. - Currently, if a Post Code is added to a Nominatim Query and the Post Code is not within the OSM data set, Nominatim will return **no results** This appears to be the intended behaviour, which I believe to be wrong and have raised as an issue on Nominatim. [Issue on Twain's Nominatim Github Repo](https://github.com/twain47/Nominatim/issues/59) OSM Trac](https://trac.openstreetmap.org/ticket/4867) [Issue on OSM Trac](https://trac.openstreetmap.org/ticket/4867) Nominatim Github](https://github.com/twain47/Nominatim/issues/59) [1]: http://taginfo.openstreetmap.org.uk/keys/addr%3Apostcode#overview [2]: https://github.com/twain47/Nominatim

@SK53 and @Russkel really answered this in the comments of the other proposed answer, but for clarity, the approximate explanation/answer is as follows: - Nominatim is based on the OSM data - OSM Post Code data is largely incomplete - The current status of Post Code data can be viewed on the [OSM TagInfo][1] website. - Currently, if a Post Code is added to a Nominatim Query and the Post Code is not within the OSM data set, Nominatim will return **no results** This appears to be the intended behaviour, which I believe to be wrong and have raised as an issue on Nominatim. [Issue on Twain's Nominatim Github Repo](https://github.com/twain47/Nominatim/issues/59) [Issue on OSM Trac](https://trac.openstreetmap.org/ticket/4867) [1]: http://taginfo.openstreetmap.org.uk/keys/addr%3Apostcode#overview [2]: https://github.com/twain47/Nominatim

@SK53 and @Russkel really answered this in the comments of the other proposed answer, but for clarity, the approximate explanation/answer is as follows: - Nominatim is based on the OSM data - OSM Post Code data is largely incomplete - The current status of Post Code data can be viewed on the [OSM TagInfo][1] website. - Currently, if a Post Code is added to a Nominatim Query and the Post Code is not within the OSM data set, Nominatim will return **no results** This appears to be the intended behaviour, which I believe to be wrong and have raised as an issue on Nominatim. [Issue on Twain's Nominatim Github Repo](https://github.com/twain47/Nominatim/issues/59) [1]: http://taginfo.openstreetmap.org.uk/keys/addr%3Apostcode#overview [2]: https://github.com/twain47/Nominatim

@SK53 and @Russkel really answered this in the comments of the other proposed answer, but for clarity, the approximate explanation/answer is as follows: - Nominatim is based on the OSM data - OSM Post Code data is largely incomplete - The current status of Post Code data can be viewed on the [OSM TagInfo][1] website. - Currently, if a Post Code is added to a Nominatim Query and the Post Code is not within the OSM data set, Nominatim will return **no results** This appears to be the intended behaviour, which I believe to be wrong and have raised as an issue on Nominatim. [1]: http://taginfo.openstreetmap.org.uk/keys/addr%3Apostcode#overview [2]: https://github.com/twain47/Nominatim