The DA postcode area covers Dartford and much of north-west Kent across around 18 districts (DA1–DA18). Every DA 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 DA results in under 100ms, free to try with no card required.
Live results from Royal Mail's Postcode Address File (PAF).
How does DA postcode work?
A DA 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 DA 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 DA data is drawn from the same national PAF file used by Royal Mail, so a lookup in DA 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 DA use?
The DA postcode area is anchored on Dartford, running from DA1 in the town centre out to Bexleyheath (DA6–DA7), Erith (DA8), Sidcup (DA14–DA15) and Gravesend (DA11–DA13). All DA districts resolve against Royal Mail PAF.
Why use AutoPostcode for DA address lookup?
- Royal Mail PAF-backed data covering every deliverable DA 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 |
| DA coverage | Full | Full |
| Pay-as-you-go | Yes | Often minimums |
| Free trial | Yes, no card | Rarely |
| Setup time | Minutes | Hours/days |
Get started with DA 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 DA.
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Frequently asked questions
What is the DA postcode area?
The DA postcode area is the group of postcodes centred on Dartford in Kent, covering the town and much of north-west Kent and south-east London fringe. Every deliverable DA address is held in Royal Mail's Postcode Address File (PAF).
Which towns does the DA postcode cover?
The DA postcode area covers Dartford, plus Bexley, Bexleyheath, Erith, Sidcup, Welling, Swanley, Gravesend and Greenhithe.
How many districts are in the DA postcode area?
The DA postcode area has around 18 postcode districts (DA1 to DA18), spanning Dartford and north-west Kent.
Is the DA 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 DA address.
How fast is a DA postcode lookup?
AutoPostcode returns DA postcode address results in under 100 milliseconds, keeping checkout and form autocomplete instant.
Can I try the DA 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 DA 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.