The HD postcode area covers Huddersfield and the surrounding Colne and Holme valleys across nine districts (HD1–HD9). Every HD 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 HD results in under 100ms, free to try with no card required.
Live results from Royal Mail's Postcode Address File (PAF).
How does HD postcode work?
A HD 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 HD 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 HD data is drawn from the same national PAF file used by Royal Mail, so a lookup in HD 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 HD use?
The HD postcode area is anchored on Huddersfield, running from HD1 in the town centre out to Holmfirth (HD9), Meltham (HD9), Slaithwaite and Marsden (HD7) and Brighouse (HD6). All HD districts resolve against Royal Mail PAF.
Why use AutoPostcode for HD address lookup?
- Royal Mail PAF-backed data covering every deliverable HD 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 |
| HD coverage | Full | Full |
| Pay-as-you-go | Yes | Often minimums |
| Free trial | Yes, no card | Rarely |
| Setup time | Minutes | Hours/days |
Get started with HD 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 HD.
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Accurate addresses cut returned parcels, delivery surcharges and abandoned carts. Start free and see how fast HD postcode can be.
Frequently asked questions
What is the HD postcode area?
The HD postcode area is the group of postcodes centred on Huddersfield in West Yorkshire, covering the town and surrounding Kirklees and Calderdale communities. Every deliverable HD address is held in Royal Mail's Postcode Address File (PAF).
Which towns does the HD postcode cover?
The HD postcode area covers Huddersfield, plus Holmfirth, Meltham, Brighouse, Slaithwaite, Marsden and Denby Dale.
How many districts are in the HD postcode area?
The HD postcode area has nine postcode districts (HD1 to HD9), spanning Huddersfield and the surrounding Colne and Holme valleys.
Is the HD 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 HD address.
How fast is a HD postcode lookup?
AutoPostcode returns HD postcode address results in under 100 milliseconds, keeping checkout and form autocomplete instant.
Can I try the HD 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 HD 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.