Many UK companies start out with the director’s own mobile on the website, the van and the quote template. That works until the business grows: the same number then carries customer calls, supplier calls and private calls, nobody else can pick up when the owner is with a client, and if the person who handles sales leaves, the number that customers have saved leaves with them. A separate business phone number (or business telephone number, as it appears on many invoices and directory listings) solves that, because it belongs to the company rather than to a handset or an employee.

A business number is a line that customers, prospects and partners call, and it rings through to whichever phones your team already uses. CallFactory issues local, national and freephone UK numbers and connects them to mobiles, desk phones or an app, so you can start taking calls on a proper business line without new hardware. You can compare the available number types and order one on our UK phone number page.

Why a business phone number beats using a personal mobile

The first reason is continuity. A number printed on invoices, vans, directory listings and your Google Business Profile builds up value over the years, and that value should stay with the company when staff change roles, go on leave or move on. With a business number you simply point the calls at someone else, while customers keep dialling the number they know.

The second reason is control over who answers. A personal mobile rings on one handset only, whereas a business number can ring on several phones at once or one after another, so a colleague covers while you are on site or at a trade fair. Outside opening hours the call can go to voicemail, to the on-call engineer or to a recorded message, instead of ringing the owner’s personal phone late in the evening.

The third reason is how callers see you. A recognisable UK number on your website tells a buyer that there is an organisation behind the line, and it lets you separate the enquiries for sales and support on different numbers so that each one reaches the right person first time.

Which types of UK business phone number exist

UK numbering, managed by Ofcom, gives a business three main choices, and each one says something different to the caller.

  • Local geographic numbers (01 and 02). These carry an area code such as 020 for London, 0161 for Manchester or 0131 for Edinburgh. They suit firms that serve a region, such as solicitors, accountants, estate agents and trades, because the caller sees a local business. We offer local numbers in more than 20 UK cities, and a local number used this way is often called a virtual landline.
  • National numbers (0330 and 0333). A 0333 number is not tied to a region, and a call to it costs the same as a call to a landline, so it is usually included in mobile bundles. It works well as one UK-wide number for sales, bookings and general enquiries. See all national numbers.
  • Freephone numbers (0800 and 0808). On an 0800 number or an 0808 number the caller pays nothing from a landline or mobile, while the business pays for the incoming minutes. That makes freephone the natural choice for helpdesks, customer service and campaigns that aim for as many inbound calls as possible.

If you are weighing up the two non-geographic options, our comparison of 0800 and 0333 numbers goes into caller costs and perception in more detail.

How calls to your business number reach your team

A business number is not tied to a SIM card or a copper line, which is why it is often called a virtual number (our guide on what a virtual phone number is explains the technology). When a customer dials it, the call enters our network and is delivered wherever you choose: a mobile, a desk phone at the office, a colleague working from home, a branch abroad, an external call centre or our voicebot that answers every caller straight away.

You set that routing yourself in your account. With call forwarding you send calls to one phone or to a group, ringing at the same time or in turn, and you can change the destination in seconds when someone is ill or out at a client. If different people are on duty on different days, rota-based routing lets you plan that weeks ahead, so the evening and weekend calls reach whoever is on call without anyone changing settings by hand.

Staff who want business calls on their own phone can use the business number on their mobile: the call rings as a normal incoming call, without an app, and stays separate from their personal line. We deliver the call over the fixed and mobile network by default, or over VoIP when you would rather use that, and you can mix both within the same team.

What you need to register a UK business number

Ofcom lets every UK number type register on the customer’s own business address, and that address can be in any country. A company does not need a UK office or an address inside the area code, so a firm based in the Netherlands, Germany or Ireland can take a London 020 number or an 0800 line as easily as a company in Leeds. For the full picture of the rules on number use and caller costs, read our article on Ofcom regulations for business numbers.

In practice you supply your company name, the business address and a contact person when you order, after which we file the number and activate it. A new UK number is normally live within one business day. If you already have a business number with another provider, you can port it to us, and most porting requests are completed within a few business days, so customers keep dialling the number they already have.

How to choose the right business number for your company

Start with the question of who calls you and from where. If most of your customers are in one city or region, a local number in that area code is the obvious choice, because it matches what they expect from a nearby supplier. If you sell across the whole UK, a 0333 number gives you a single national identity at normal call rates, while an 0800 or 0808 number makes sense once the calls are valuable enough that you want to remove any cost for the caller.

Many companies combine types instead of picking one, for example a local number for the head office, a 0333 number for sales and a freephone line for customer support. Each number can have its own routing, opening hours and welcome message, while everything runs from the same account. What you pay depends on the number type and the minutes that come in, which you can work out on our pricing page.

Getting a business phone number from CallFactory

CallFactory has provided business phone numbers since 2000, which gives us 26 years of experience in routing inbound calls for companies across Europe. We are a licensed telecom provider in 15 countries and operate our own intelligent IVR platform, so our support team can see and change your routing, menus and voicebot directly.

Calls to your number travel over premium fixed-network routes rather than the cheapest internet path, which keeps the audio clear and the connection stable when a customer rings at a busy moment. We set up the number and the routing together with you, so it works the way your team takes calls from the first day, and you keep full control to adjust it whenever the business changes.