03 numbers
0330 Numbers
A 0330 number is a UK national rate number — callers pay the same as a standard 01 or 02 landline, and the call is covered by most UK mobile and landline bundles. Get a 0330 number for your business from £5/month + VAT with ONSIM. No app, no VoIP, no desk phone.
What is a 0330 number?
0330 numbers sit within the UK's 03 range — a set of non-geographic national rate numbers introduced to give businesses a professional UK presence that is not tied to a specific town or city.
Unlike 08 numbers (which can carry premium charges), calls to 0330 numbers cost the caller the same as dialling a standard 01 or 02 landline. Crucially, they are included in the free minutes of virtually all UK mobile and landline call plans — so most callers pay nothing extra to reach you.
Why businesses choose 0330
A 0330 number gives your business a national identity without being tied to one location. You can operate from anywhere in the UK — or work fully remotely — while presenting a consistent, professional number that customers across the country recognise and trust.
Because callers are not deterred by premium charges, 0330 numbers tend to receive more inbound calls than 084x or 087x numbers. They are widely used by businesses that want a credible national presence without the cost of running a freephone 0800 line.
How ONSIM 0330 numbers work
ONSIM routes calls to your 0330 number at network level — not through a softphone app. That means reliable call quality whether you are in an office, on site or working from home.
1. Choose your 0330 number
Select a 0330 number from ONSIM's available range. Memorable numbers and specific sub-ranges are available subject to current stock.
2. Route calls to your mobile
Calls to your 0330 number are forwarded to your existing mobile. No new hardware, no app to install — your number rings wherever you are.
3. Upgrade when ready
Start with Virtual Landline for inbound calls. When you want outbound calls to also show your 0330 number, upgrade to Landline SIM.
0330 vs other number types
Choosing the right number type matters. Here is how 0330 compares to the alternatives.
| Number type | Cost to caller | Included in bundles? | Best for |
|---|---|---|---|
| 01 / 02 (local/national) | Standard local rate | Yes | Location-specific presence (e.g. London, Manchester) |
| 0330 / 0333 (national rate) | Same as 01/02 | Yes | National presence, no location implied |
| 0300 (public sector) | Same as 01/02 | Yes | Government, NHS, charities, public bodies |
| 0800 (freephone) | Free | Yes (free to call) | High-volume inbound, customer service lines |
| 084x / 087x (premium rate) | Above standard rate | No | Generally avoided for customer-facing numbers |
Who uses 0330 numbers?
0330 numbers are used across a wide range of UK businesses: professional services firms, financial advisers, recruitment agencies, tech companies, ecommerce businesses and any organisation that serves customers across the UK rather than in a single city.
They are particularly popular with businesses that have grown beyond a single location, or with remote and mobile-first teams that want a national number without a fixed office.
Pricing
Virtual Landline (from £5/mo + VAT): your 0330 number rings on your existing mobile. Includes up to 2,500 forwarding minutes. Inbound calls only.
Landline SIM (from £10/mo + VAT): inbound and outbound calls showing your 0330 number, delivered natively on your mobile via SIM/eSIM. No app required.
0330 number FAQs
Common questions about 0330 numbers and how they work.
Get a 0330 number today
ONSIM 0330 numbers start from £5/month + VAT — no app, no VoIP, no hardware. Your 0330 number rings on your existing mobile in minutes.