Buy 0300 Numbers for Your Business

0300 numbers from Number Supermarket come with your first 2 months completely free, then from £14.99/mo + VAT on the Solo package. The Works package is £24.99/month + VAT and includes 3 numbers, 1,000 free inbound minutes a month, real-time reporting and 4 call features of your choice (for example call recording, IVR, hunt groups). Extra features on The Works are £9.99 a month + VAT each. You can also buy a number outright for a one-off payment of £497 + VAT. There is no set-up fee. Solo and The Works are 12-month minimum contracts.

0300 numbers are not free to call in the same way that 0800 freephone numbers are, but a call to an 0300 costs the same as calling 01 and 02 numbers: up to 16p a minute from landlines and 3p to 65p from mobiles, and may be free within the caller's call package (GOV.UK). Ofcom requires calls to 03 numbers (0300, 0330, 0333, 0345, 0370) to cost the same as calls to 01 and 02 numbers.

0300 is not a geographic area code. It is a UK non-geographic number range introduced by Ofcom in 2007 (alongside 0330, 0345 and 0370) and is reserved for not-for-profit and public-sector use. Calls cost the same as a standard UK landline call (01/02) and are included in callers’ inclusive minutes. 0300 numbers are not tied to any city or region, which is why they’re the standard range for the NHS, central government, local councils and registered charities.

Yes. When you buy an 0300 number from Number Supermarket, you can forward calls to any UK landline or mobile number. You can change your divert destination at any time through our online portal or smartphone app — useful for after-hours redirection, holiday cover, or routing different services to different teams.

Your 0300 number is usually live the same day. You choose your number and select your package, and we call you before your number goes live. No engineers, no installations.

Solo includes call forwarding. The Works includes 4 call features of your choice from 20+. Extra features on The Works are £9.99 a month + VAT each. With The Works, the options for your 0300 number include voicemail to email, call recording, call whisper, time-of-day routing, hunt groups and IVR auto-attendant.

No. An 0300 number works with your existing phone setup. Calls are forwarded to whatever number you choose — office landline, mobile, or home phone. There is no hardware to install and no software required.

Yes. Under Ofcom regulations, you have the right to port your 0300 number to any other provider. Porting usually takes 1–2 weeks, depending on the network. If you bought your 0300 number outright, it is yours.

0300 numbers are reserved by Ofcom for non-commercial organisations. Eligible categories are registered charities, public-sector bodies (central government, devolved administrations, NHS trusts, local councils, emergency services), educational establishments, and community amateur sports clubs (CASCs). Major users include NHS 111, HMRC, DVLA, Citizens Advice and Macmillan. Number Supermarket will confirm eligibility during checkout — you’ll need your charity registration number, public-sector identifier or CASC registration. Commercial businesses should choose 0330, 0345 or 0370 instead, which offer the same caller-friendly pricing with no eligibility check.

Two differences: cost and eligibility. 0800 is freephone — completely free for callers, business pays per-minute, available to any UK business. 0300 is a national-rate number — caller pays standard landline rate (almost always included in their allowance), but is Ofcom-restricted to charities and public-sector bodies. For commercial businesses, the closest 0300 equivalent is 0330 — same calling rules, no eligibility check.