0330, 0333 and 0345 Numbers Explained: Costs, Differences and Who’s Calling You

Quick answer: 0330, 0333 and 0345 numbers are UK non-geographic business numbers. Calling them costs exactly the same as calling a normal 01 or 02 landline, and they must be included in your inclusive minutes by Ofcom rules, so on almost every modern phone plan they’re effectively free to call. They are not premium rate and they are not a scam prefix.

That’s the short version. Below you’ll find everything else people ask about 03 numbers: what each prefix is for, exactly what calls cost, who’s likely to be ringing you from one, how to call them from abroad, and why so many UK businesses use them.

What are 03 numbers?

Ofcom introduced the 03 range in 2007 to give businesses and organisations a national number that isn’t tied to any town or city, with one simple consumer promise attached: calling an 03 number can never cost more than calling a standard landline. That single rule is what separates 03 from the older 084 and 087 ranges, which carry service charges on top of your normal call cost.

The family includes 0300, 0330, 0333 and 0345, and while they all cost the same to call, they’re used by different kinds of organisations:

• 0330 and 0333 are open to any business. These are the workhorses of the range, used by insurers, retailers, energy suppliers, delivery firms and thousands of small businesses that want a national presence.
• 0345 is most commonly held by organisations that migrated from old 0845 numbers, which is why you’ll see it on letters from banks, utilities and government agencies like the DVLA.
• 0300 is reserved for charities, not-for-profits and the public sector. If a 0300 number rings you, it’s typically the NHS, a council, HMRC or a registered charity.

How much do 0330, 0333 and 0345 numbers cost to call?

The same as a call to a normal 01 or 02 landline. That’s not marketing, it’s an Ofcom requirement. In practice:

• From a mobile: included in your inclusive minutes, exactly as a landline call would be. If your plan has unlimited minutes, calling an 03 number costs nothing extra.
• From a landline: charged at your provider’s standard geographic rate, and included in any call bundle that covers 01 and 02 numbers.
• Payg mobiles: charged at your provider’s standard landline rate, typically pennies per minute rather than the premium rates 084 and 087 numbers can carry.

There is no connection fee, no service charge and no revenue sharing on any 03 number. If you’ve ever hesitated before ringing a company’s 0333 number, you can stop: it costs you the same as ringing your local takeaway.

Who called me from a 0330 or 0333 number?

A very common question, and the answer is usually mundane: a legitimate UK organisation. Because 03 numbers are cheap for customers to call back and work anywhere in the country, they’ve become the default outbound number for insurers chasing renewals, delivery companies confirming slots, banks’ customer service teams, energy suppliers and NHS appointment lines.

That said, the prefix alone doesn’t guarantee the caller is genuine. Like any UK number, an 03 number can be spoofed by scammers. The sensible rules apply regardless of prefix: if an unexpected caller asks for bank details, passwords, one-time codes or payments, hang up and call the organisation back on the number printed on their website or your paperwork. A genuine company will never object to that.

Can I call 0330, 0333 and 0345 numbers from abroad?

Yes. Dial +44, drop the leading zero, then the rest of the number, so 0330 123 4567 becomes +44 330 123 4567. Be aware that the “same as a landline” pricing rule only applies within the UK. From abroad, your overseas provider or roaming plan sets the price, and it will treat the call like any other international call to the UK. If you call UK 03 numbers from overseas regularly, doing it over Wi-Fi with an internet calling app is usually the cheapest route.

0330 vs 0333 vs 0345: which should your business choose?

For callers there’s no difference at all: identical cost, identical rules. For businesses choosing a number, the decision comes down to positioning and availability:

• Choose 0333 if you want the widest choice of memorable numbers. It’s the most commonly issued prefix and the easiest to find a pattern you like.
• Choose 0330 if you want the same benefits with a slightly less saturated prefix. Functionally identical to 0333.
• Choose 0345 if you’re moving off an old 0845 number and want your customers to make the smallest possible mental jump. In many cases you can keep the same final digits.

Why businesses use 03 numbers

A national 03 number solves problems a geographic number can’t. It gives a business based in Bolton the same nationwide feel as one based in central London. It stays with you if you move premises, so the number on your van, your signage and ten years of printed invoices never has to change. And because customers know 03 calls are included in their minutes, they’re measurably more willing to ring one than an 084 or 087 number, which many people now refuse to call at all. If you would rather calls were completely free for your customers, an 0800 freephone number is the alternative: free for them to ring, with your business picking up the cost.

An 03 number from Planet Telecom is virtual, meaning it sits on top of your existing landline or mobile. Calls to your new number route wherever you choose, you can change the destination in seconds from your online dashboard, and there’s no new equipment to buy. You can browse available numbers and pricing on our 0333 numbers page, and it pairs naturally with a business VoIP system if you want call routing, menus and voicemail-to-email behind it.

Frequently asked questions

Are 0330 numbers free to call?

Not technically free, but they cost the same as calling a standard landline, and they’re included in inclusive minutes on virtually every UK mobile and landline plan. For most people that means calling one costs nothing extra.

Are 0333 numbers included in EE, O2, Vodafone and Three minutes?

Yes. Ofcom requires every UK provider to include 03 numbers in call bundles on the same basis as 01 and 02 landline numbers. This applies to all networks, contract and pay-as-you-go alike.

Is a 0330 number a scam?

The prefix itself, no. 0330 is a regulated UK business range used overwhelmingly by legitimate organisations. Individual numbers can be spoofed by scammers, as any number can, so judge the call by what the caller asks for, not the prefix.

What’s the difference between 0300 and 0330?

Cost and rules are identical. The difference is who can hold them: 0300 is restricted to charities, non-profits and public bodies, while 0330 is open to any business.

Can I keep my 03 number if I switch provider?

Yes. 03 numbers are fully portable between providers, so you’re never locked in. Planet Telecom handles porting for you if you’re bringing an existing number across.

How quickly can my business get an 03 number?

Usually the same day. Choose a number, connect it to your existing landline or mobile, and you’re taking calls on it within minutes. See our available 0333 numbers to get started.