Mobile validation API

Check mobile numbers are valid

Capture better quality customer data   No ghost calls or texts   Stop wasting staff time

UK and international mobile number validation

Works internationally

Verify whether a UK or international mobile number is capable of receiving texts and calls.

Standardise numbers

Translate hapahazardly inputted mobile numbers into a standard format for your database.

Switched on

Determine whether a mobile phone has been switched on recently.

Real time check

Validation performs a live HLR lookup rather than using historic records.

Network provider

Identify the carrier associated with a mobile phone number.

No silent calls

Mobiles are not called and will not ring during the validation process.



Try the demo

See how it works with any mobile phone number



Use PostCoder Web across your business

Checkout and signup forms

Capture real numbers from your customers which you can rely on later.

Call centres

Help your staff by reducing their calls to numbers that don't exist.

CRMs and sales apps

Minimise typos by checking numbers as they’re entered into your system.


Use PostCoder Web across your business

A simple API for developers

Sign up for an API key and get free lookups to try

Cross platform mobile validation using the PostCoder Web API

Easy to integrate examples
Secure HTTPS requests
Reporting tools and usage alerts
30ms average response time
>99.99% uptime
Enterprise SLA available

API documentation
Get your API key


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“2x faster checkout times - PostCoder Web has literally transformed our checkout process”

- Zak Edwards, Founder of Prezzybox

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