The CF postcode area covers Cardiff and much of the south Wales valleys across around 40 districts (CF3–CF83). Every CF 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 CF results in under 100ms, free to try with no card required.
Live results from Royal Mail's Postcode Address File (PAF).
How does CF postcode work?
A CF 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 CF 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 CF data is drawn from the same national PAF file used by Royal Mail, so a lookup in CF 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 CF use?
The CF postcode area is anchored on Cardiff, running from CF10 in the city centre out to Pontypridd (CF37–CF38), Barry (CF62–CF63) and Caerphilly (CF83). All CF districts resolve against Royal Mail PAF.
Why use AutoPostcode for CF address lookup?
- Royal Mail PAF-backed data covering every deliverable CF 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 |
| CF coverage | Full | Full |
| Pay-as-you-go | Yes | Often minimums |
| Free trial | Yes, no card | Rarely |
| Setup time | Minutes | Hours/days |
Get started with CF 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 CF.
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Frequently asked questions
What is the CF postcode area?
The CF postcode area is the group of postcodes centred on Cardiff in south Wales, covering the capital and much of the surrounding valleys. Every deliverable CF address is held in Royal Mail's Postcode Address File (PAF).
Which towns does the CF postcode cover?
The CF postcode area covers Cardiff, plus Pontypridd, Barry, Bridgend, Caerphilly, Merthyr Tydfil and surrounding parts of south Wales.
How many districts are in the CF postcode area?
The CF postcode area has around 40 postcode districts (CF3 to CF83), spanning Cardiff and much of the south Wales valleys and coast.
Is the CF 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 CF address.
How fast is a CF postcode lookup?
AutoPostcode returns CF postcode address results in under 100 milliseconds, keeping checkout and form autocomplete instant.
Can I try the CF 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 CF 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.