The DN postcode area covers Doncaster and much of northern Lincolnshire and the Humber region across around 40 districts (DN1–DN41). Every DN address is held in Royal Mail's Postcode Address File (PAF), which spans about 31 million UK addresses across roughly 1.8 million postcodes. AutoPostcode returns DN results in under 100ms, free to try with no card required.
Live results from Royal Mail's Postcode Address File (PAF).
How does DN postcode work?
A DN postcode matches a full or partial postcode against Royal Mail's Postcode Address File (PAF), the UK's official address database of around 31 million addresses across roughly 1.8 million postcodes. You type a DN postcode, AutoPostcode returns every deliverable address at that location in milliseconds, and the user selects the correct one — no manual typing, no typos.
AutoPostcode's DN data is drawn from the same national PAF file used by Royal Mail, so a lookup in DN is as accurate as anywhere else in the UK. Integrate it through our postcode lookup API or drop the widget into any checkout with a few lines of code.
Which postcodes does DN use?
The DN postcode area is anchored on Doncaster, running from DN1 in the town centre out to Scunthorpe (DN15–DN17), Grimsby (DN31–DN37), Cleethorpes (DN35) and Goole (DN14). All DN districts resolve against Royal Mail PAF.
Why use AutoPostcode for DN address lookup?
- Royal Mail PAF-backed data covering every deliverable DN address
- Sub-100ms responses so checkout never stalls
- Simple, affordable pricing — a modern alternative to Loqate, Fetchify and Ideal Postcodes
- Developer-friendly REST API with drop-in front-end widget
- GDPR-compliant, UK-hosted lookups
How does AutoPostcode compare to other lookup tools?
| Feature | AutoPostcode | Typical incumbent |
|---|---|---|
| Data source | Royal Mail PAF | Royal Mail PAF |
| DN coverage | Full | Full |
| Pay-as-you-go | Yes | Often minimums |
| Free trial | Yes, no card | Rarely |
| Setup time | Minutes | Hours/days |
Get started with DN postcode
Try the free lookup above, then wire AutoPostcode into your site with the UK address validation API for full validation, or the postcode lookup API for autocomplete. You can also explore the full product range to see nationwide coverage beyond DN.
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Frequently asked questions
What is the DN postcode area?
The DN postcode area is the group of postcodes centred on Doncaster in South Yorkshire, covering the town and much of northern Lincolnshire and the Humber region. Every deliverable DN address is held in Royal Mail's Postcode Address File (PAF).
Which towns does the DN postcode cover?
The DN postcode area covers Doncaster, plus Scunthorpe, Grimsby, Cleethorpes, Goole, Rotherham fringe, Thorne and Stainforth.
How many districts are in the DN postcode area?
The DN postcode area has around 40 postcode districts (DN1 to DN41), spanning Doncaster, northern Lincolnshire and the Humber region.
Is the DN postcode address data accurate?
Yes. AutoPostcode uses the official Royal Mail PAF, which holds around 31 million UK addresses across roughly 1.8 million postcodes, including every deliverable DN address.
How fast is a DN postcode lookup?
AutoPostcode returns DN postcode address results in under 100 milliseconds, keeping checkout and form autocomplete instant.
Can I try the DN postcode lookup for free?
Yes. Use the free demo on this page, then start a free trial with no credit card to integrate it into your own website.
How do I add a DN postcode lookup to my site?
Use the AutoPostcode postcode lookup API or drop-in widget — most sites integrate it in minutes with a few lines of code.
Ready to get started?
Add Royal Mail PAF-verified UK address lookup to your site in minutes — start free, no card required.