The district code is part of the outward code. It is between two and four characters long. It does not include the trailing letter found in some outcodes. The sub-district code is part of the outward code. It is often not present, only existing in particularly high density London districts.
A house number must still be provided to complete the system. Jack Hill, St Albans, England The country is split into areas, each with a two-letter code based on the name of a major town in the area.
These are sub-divided into postal districts, usually centred around the head post office of the area, which completes the first half of the code. Further sub-divisions provide the number, and then the twin letters.
L Smith, Edinburgh Scotland They just are. Once they've been allocated a district they become extremely territorial. They're amazingly perverse, stubborn little numbers. The vast majority of addresses were postcoded in the 's.
New build houses etc that require a postcode must apply to the Address Management Centre in Portsmouth. While the first three characters will be determined by its location, the last three can be fairly random, decided by the person who is dealing with the application. You can review the current Postcode Update along with those published during the past few years by going to Royal Mail's website. If you would like Map Marketing to advise you when new editions of Postcode Update are published then simply register your interest.
Our custom mapping department can create affordable, unique site-centred maps covering just the area you need. Choose from a wide range of map styles, scales, data overlays and finishing options.
Click here for more information or get a customised map. Close search. Wall Maps expand. Postcodes Explained.
Developed originally by The Royal Mail to enhance and streamline postal delivery, Postcodes and Postcode geography have evolved to form an integral part of business planning as an established reference point throughout the United Kingdom. The applications are infinite and effectiveness relies on current Postcode boundaries data. At Map Marketing, the digital print technology we use to produce our Postcode maps ensures our products are kept right up to date with The Royal Mail boundary release information.
Postcode Boundaries By adding postcode boundary information to your chosen map base you can transform a simple map into a crucial planning tool. How Postcodes Work The Postcode is a group of between 5 and 7 letters and numbers that identify a group of houses or addresses. Each one varies in size and population quite considerably. The UK has about 11, postal sectors. Sectors are used in the inbound code to help pick the delivery round. There are between 1 and 10 sectors to make a district.
On average each district has 3 sectors. A unit postcode describes a street or part of street, a single address, a group of properties, a subsection of a property or an individual organisation or department within an organisation. There are more than 1. This number changes regularly as around 2, postcodes are created and 2, are terminated each month.
The allocation of postcodes depends on the amount of mail received. Large users of mail such as the DVLA have different postcodes for different departments. The unit postcodes are used to find about 30 million actual addresses or delivery points, the minimum number of delivery points for a postcode is one, the maximum is , and on average the postcode is allocated to 17 delivery points. There are on average postcodes to each sector: the most being , the least is 1.
That leaves 20 for each letter. Since their inception, postcodes have become more than just a tool to help address mail. As postcodes nest into sectors, districts and areas, the postcode has become a handy label to define geographical locations. Postcode boundaries provide a convenient way to tie people into manageable groups with similar lifestyles and outlooks to form the building blocks of geodemographic analysis.
See our blog on geodemographic analysis Although postcodes focus on addresses, their aggregated groupings and boundaries provide an ideal building block for geographic analysis. Most businesses have data that is attached to postcode information. This could be customer records, or sales receipts for a store where the customers are most likely to travel to. Having data attached to postcodes opens up analysis and comparisons using census or other demographic data.
Our own GIS systems can use postcodes as their geographical key. Read about our work with postcode mapping Postcodes are a far more accessible reference than coordinates or longitude and latitude making them ideal for setting departure and destination points in navigation tools.
However, the sheer number of postcodes means that when you move beyond individual journeys, for business or fleet logistics planning the calculations required quickly become unmanageable. See our blog on postcode sector-based journey planning In existence in some form for more than 1, years, the divisions are based on long-standing counties and parish boundaries, which have themselves changed and been sub-divided over the centuries.
This reference source ties postcodes to census and other demographic datasets. Read our blog exploring the history and use of administrative geography As you can see, postcodes have developed into far more than just a means of directing your post, they have become a fundamental building block for navigation, logistics and economic operation. Postcode mapping for business is what we do, so forgive us if we seem a little too passionate about the subject, but I'm sure you'll agree, there really is a lot to the humble postcode.
We've spent more than 25 years working with postcode geography and postcode mapping. If you'd like to see if we can help your business, please get in touch. Contact us online or call us on: Turning a list or spreadsheet of postcode data into a series of points on a map isn't as simple as using an Excel wizard to do it for you, but it isn't rocket science. We look at the latest update to TimeTravel, our dataset of drive times and distances between any postcode sector or district.
What has changed in the UK road and geographic network, plus new features to make it even more accurate. But what is it, and why should we care? Each year for cycletoworkday we take a look at cycling statistics across the country and try to map that data and find interesting trends.
This is mainly because we at Beacon Dodsworth are either a little bit obsessed about cycling, or we tend to worry about the environment.
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