0333 Number: What It Is, What Callers Pay and How to Use One

A 0333 number is a UK-wide, non-geographic number from the 03 range. It is not tied to a town or area code, and Ofcom's rules say calls to 03 numbers should cost no more than calls to ordinary 01 or 02 landline numbers. That makes it a popular choice for businesses that want a national number without a high call cost for customers.

This article explains what a 0333 number is, what callers are charged, who tends to use one and how calls can be routed. It is written for UK small business owners, sole traders, charities and taxi firms deciding whether a 0333 number suits them, or trying to understand one they have been given.

TL;DR

A 0333 number is a non-geographic 03 number that is not linked to any UK location.
Calls to 03 numbers are charged at the same rate as calls to 01 and 02 numbers, and are normally covered by inclusive minutes on landline and mobile plans.
Any business, charity or organisation can use a 0333 number, and it can be forwarded to a landline, mobile or VoIP system.
It suits firms that trade across the UK or want to keep a number if they move premises.
If you need a local presence or a free call for the caller, a geographic or freephone number may fit better.

What a 0333 number actually is

UK telephone numbers are divided by their first digits. 01 and 02 numbers are geographic, such as 020 for London or 0161 for Manchester. 07 numbers are mobiles. 03 numbers are non-geographic: they belong to no place, so they work the same wherever you are based.

The 03 range includes 0300, 0301, 0302, 0303, 0330, 0333, 0343, 0344, 0345 and 0370, among others. Numbers in the 0300 range are generally associated with public bodies and non-profit organisations, so a business is more likely to be offered a 0333 number.

A 0333 number has eleven digits including the leading zero, like most UK numbers. For an example of the style, Ofcom reserves 0306 999 0000 to 0999 for use in TV and radio dramas, so a written example would look like 0306 999 0123.

The number itself does not carry a phone line. It is a route. You choose where calls land, and you can change that destination without changing the number printed on your van, website or letterhead.

What callers pay to ring a 0333 number

This is the main reason people choose 03. Under rules set by Ofcom, calls to 03 numbers should cost no more than calls to geographic 01 and 02 numbers. They should also count towards the inclusive minutes that come with a landline or mobile plan, in the same way as calls to a geographic number.

In practice, a customer ringing from a mobile with inclusive minutes will usually not see a separate charge. A customer without inclusive minutes pays whatever their provider charges for a standard call to a geographic number. The exact rate depends on their provider and plan, so we cannot quote a single figure.

What it costs you to receive the call

The business, not the caller, pays for the number and for any routing. Costs usually come in three parts: the number itself, a monthly or annual line or routing fee, and the cost of forwarding calls to your chosen destination. All of these vary by provider and plan, so check each before you commit.

If you want a call that costs the customer nothing, 0333 is the wrong tool. That is the job of a freephone number, which we cover in What Is a Freephone Number and Why Use One?

Pro Tip: Say on your website that calls to your 0333 number cost the same as a standard UK landline call, with the exact price depending on the caller's plan. It can reassure customers who remember the high charges of older 084 and 087 numbers.

Who uses 0333 numbers, and why

Businesses choose a 0333 number when they want a national identity rather than a local one. A few typical cases:

Online retailers and service firms that serve customers across the UK from one small office or a spare room.
Home-based sole traders who prefer not to publish a personal mobile or a home landline.
Charities and community groups that want one number for supporters and volunteers in different regions.
Growing firms that expect to move premises and do not want to reprint stationery.
Multi-site businesses that want one front-door number that can ring different branches.

A 0333 number also hides where you are. A firm in Hampshire and a firm in Aberdeen look the same to a caller. For some businesses that is the point. For others, particularly local trades, it works against them.

Plumbers, electricians, taxi firms and restaurants often benefit from a local area code, because customers searching for someone nearby tend to trust a familiar prefix. We cover that in Your guide to 01 and 02 phone numbers in the UK.

0333 compared with other number types

It helps to see where 0333 sits against the alternatives.

01 and 02 geographic numbers: tied to an area, trusted locally, and charged at the standard landline rate.
0300 and other 03 numbers: the same charging rule as 0333. The difference is mainly who the range is associated with and the digits you can pick.
0800 and 0808 freephone: free for the caller, but the business pays for the call.
084, 087 and 09 numbers: service charges can apply on top of the access charge, so the caller can pay considerably more.
07 mobile numbers: suited to personal contact and some direct lines, but not what most customers expect for a business front door.

The call-cost rules for 08, 09 and 118 numbers are more involved. Our guide to premium rate numbers and what UK businesses must know explains the risks, and the toll-free versus landline guide helps you weigh free-to-caller against local trust.

Pro Tip: If you cannot decide between 0333 and a local number, consider having both. Print the 0333 number nationally, use a local number on your Google Business listing or vehicle livery, and send both to the same phone.

How calls to a 0333 number are routed

A 0333 number does not need its own physical line. Calls are forwarded to a destination you choose, and you can usually change it whenever you like. Common routing options include:

Forward to a landline or mobile. The simplest set-up for a sole trader. Calls ring your existing phone, and you answer as normal.
Ring several phones at once. Useful for a small team or a taxi firm. Taxi Connect Direct, for example, can ring up to five phones together so the first person free picks up.
Run on a mobile SIM. A number can sit on an XL Mobile SIM on the EE network, so the business line travels in your pocket.
Use a VoIP service. The XL Hosted Voice service lets you take calls on a Fanvil desk phone or the Zoiper app on a phone or computer.

Extras worth considering

Depending on the service, you can add a welcome announcement, queuing music, voicemail and call recording. Call recording brings data protection duties, such as telling callers they are being recorded. The ICO publishes guidance on this, and we cannot tell you whether your set-up meets the rules.

For a wider look at how non-geographic numbers work day to day, read How to Use Non-Geographic Numbers for UK Businesses.

Getting a 0333 number, and moving one

You can buy a number outright, rent it, or rent-to-buy. Renting tends to keep the upfront cost down, while buying suits a number you intend to keep for years. Rent-to-buy sits between the two.

The steps are usually straightforward:

Choose a number. Look for easy patterns, repeated digits or a run that is simple to say over the phone.
Decide where calls should go and what extras you need.
Pay for the number and set up the routing.
Test it from a landline and a mobile before printing it anywhere.

A number you own can usually be moved to another provider later, subject to that provider's terms. Porting timescales depend on both providers, so do not promise a date to customers until your new provider confirms one. Do not cancel your old service before the move is complete, or the number may be lost.

Ofcom has more on switching and on how numbers are managed on its website. If you have a problem you cannot resolve with a provider, Citizens Advice can point you to the next step.

Common mistakes to avoid

Most problems with 0333 numbers come down to a handful of avoidable choices.

Choosing a number that is hard to say. If you have to repeat it three times over the phone, customers will give up. Read it aloud before you buy.
Forgetting about the local audience. A national number can lose out to a competitor with a local code if you rely on nearby customers.
Assuming the call is free. It is not. Callers pay a standard rate, or use inclusive minutes. If free calls matter, consider a freephone number.
Not planning for missed calls. Set up voicemail, or a second destination, so a busy phone does not lead to a dead line.
Printing before testing. Check the number rings the right phone, and test it from different networks.
Leaving the number tied to one person. Make sure the account is in the business name, so a change of staff does not lock you out.

Pro Tip: Write the number in the same spaced format everywhere, for instance 0333 followed by three digits then four. A consistent layout is easier to read and helps customers recognise it.

A 0333 number will not bring in more calls on its own. What it does is give you a professional, portable contact point that you control.

We have found that 0333 suits businesses that are honest about who they serve. If you sell across the UK, it is a sensible, low-risk choice. If you rely on local trade, we usually suggest a local 01 or 02 number first, and a 0333 number as a second line. We also advise people to choose a number they can say aloud without effort, because that matters more than any prefix. Test it, answer it promptly and keep it for years.
- The PhoneNumbers.Store team

About PhoneNumbers.Store

PhoneNumbers.Store has sold, rented and rent-to-bought memorable UK numbers from Fareham since 2014. You can search for a number, browse numbers by area if you want a local 01 or 02 code, and see the full products and services list. Calls can be forwarded, rung to up to five phones with Taxi Connect Direct, or run on an XL Mobile SIM or XL Hosted Voice. Start at the home page, or message us on WhatsApp. Our own number is 01329 007 007.

Frequently asked questions

Is a 0333 number free to call?

No. Calls to 0333 numbers should cost the same as calls to standard 01 and 02 landline numbers, and are normally covered by inclusive minutes on landline and mobile plans. The exact charge depends on the caller's provider and plan. If you want calls to cost the customer nothing, you need a freephone number instead.

Can any business have a 0333 number?

Generally yes. 0333 is open to ordinary commercial use, so sole traders, limited companies, charities and organisations can all use one. You do not need an office in any particular place. The number can be forwarded to a mobile, a landline or a VoIP service of your choice.

Does a 0333 number show where I am based?

No. It is a non-geographic number, so it carries no town or area information. Callers cannot tell whether you are in Hampshire or the Highlands. That suits national businesses, but local trades often prefer a recognisable area code because customers search for someone nearby.

Can I keep my 0333 number if I change provider?

Often, yes, but it depends on the providers involved. A number you own can usually be moved to a new provider. Timescales depend on both providers, so confirm a date with the new one first, and keep the old service running until the transfer has finished.