Telephone Numbers

Choose any telephone number or virtual phone number. We’ve got you covered in different areas. VoIP Business with Fullduplex has been porting numbers and providing telephone services since 2006.

Block of Phone Numbers

Use phone numbers from any area code. Also available in blocks of 3 and 10

From Around the World

Order block of telephone numbers from around the world

Keep Your Number

Easily port your landline phone number to VoIP Business

UK Telephone Numbers with VoIP Business

We have access to over 9 million UK Geographic numbers, ready to be assigned, within seconds.

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Numbers in Every Town

Numbers in almost every UK town and city.

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Block of Phone Numbers

Order block of numbers, available on request from 10 to 1000.

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Fax Enabled Numbers

Receive and send FAX on demand using email.

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SMS Enabled Numbers

Send and receive text messages on your UK landline number.

Easily Transfer Your Existing Telephone
Number To VoIP Business

VoIP Business with Fullduplex has been porting numbers and providing telephone services since 2006. Our switching process is seamless as it takes seconds to switch over to us. So no downtime for you.


Porting Number

Let us know the number which you wish to port over.

Service Provider

We will send your porting request to your current service provider.

Porting Date

Your current service provider lets us know the porting date.

Porting is Complete

et voila !! Success, your number porting is complete.

International Number

International calling does not have be so expensive, not with VoIP Business! Book international numbers for £9.99 per month and a one-time setup fee of £15.


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Phone Numbers of Your Choice

London Phone Numbers

Get 0207, 0208 and 0203 numbers for your business giving you those London vibes.

Local Telephone Numbers

Get all the features of a UK local phone number – choose from London, Manchester, Bristol, Glasgow, Bournemouth.

Virtual Phone Number

Virtual phone numbers allow you to have a virtual presence anywhere in the country.

0800 Numbers

The Freephone 0800 numbers give your business that customer friendly free-to-call image, and the ability to improve the volume of calls.

03 Telephone Numbers

03 numbers are non-geographic numbers and tend to be UK-wide national numbers. If you don’t want to use a local area number, an 03 number is ideal.

0844 Numbers

If you run a business that is not geographically dependent, then choose a national number with a 0844 number.

0845 Telephone Numbers

Why not go national with 0845 numbers. Moreover there are lots of choice for numbers and the all important 0345 version if you require.

International Numbers

Go global, Irish, French, USA or China in fact numbers in most business locations are available.

Frequently asked questions

Pretty much quickly, most happen within 7 days whilst others take about 10 days, it depends on your provider. We have migrated some clients in less than 72 hours, so you’re in safe hands.

Of course you can, we handle any number, whether is a non-geographic number, local number or international number. Just let us know how many numbers you wish to migrate and we’ll arrange for that.

If some providers are stuck in the dark ages, then they might do, but most don’t. We don’t charge to port your number to us either, so you enjoy a stress-free number porting.

You can definitely buy a single number or a block of numbers. For example, if you need a block of 10 successive numbers for your business, we’ll book it for you to order. You can purchase up to 1000 numbers at one go.

You name any area in the UK, we’ve got numbers for them. Just choose your numbers and if you have multiple offices around the country, feel free to pick out the numbers the most relevant to you.

Sure, we have SMS and Fax enabled numbers, when you get in touch with us, let one of our advisors know and we;ll sort it out for you.

Take a Premium 30-Day Trial Now !

Or sign up for the “ever-free” plan.
No contract, no risk and no obligation.

VoIP Business simple !