postcodes.io is widely used for mapping a postcode to its area, district and coordinates. What it does not do is return the list of deliverable addresses at a postcode — that requires the licensed Royal Mail Postcode Address File.
When you need a PAF-backed alternative
- Checkout and shipping address selection
- Address verification and standardisation
- Full delivery-point addresses, not just geography
- Deliverable data couriers can use
How AutoPostcode helps
AutoPostcode returns full addresses from official PAF data via a postcode to address API, with a no-code plugin and per-website keys. See the best UK postcode lookup API guide.
Frequently asked questions
Is postcodes.io enough for ecommerce?
postcodes.io is a great free, open API for geographic postcode data, but it does not return full Royal Mail PAF delivery-point addresses. For checkout address selection you typically need PAF-backed lookup like AutoPostcode.
What's the difference?
postcodes.io maps postcodes to areas/coordinates; AutoPostcode returns the actual deliverable addresses at a postcode from official PAF data.
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