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Compare 01/02 Numbers 03 Numbers 0300 Numbers 0800 Numbers 0845 Numbers 0844 Numbers 0843 Numbers 0871 Numbers

The UK' s No.1 Supplier since 1999.

030 Numbers are trusted by the Public.

Popular with charities & government bodies.

Used by Children in Need, RSPCA, Oxfam

 NHS, Met Police and many local councils.

 Choose a highly memorable number.

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0300 & 0303 Numbers

Only available to public sector, charities and non-profits

0300 and 0303 numbers can only be used by not-for-profit organisations and are therefore trusted by the public. Using a 030 number can really help to improve your organisation's profile. Calls to 03 numbers are charged at the same rate as 01/02 numbers.

No set up or connection charges, just a simple monthly fee.
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Don't worry, during the trial there are no rental or usage fees to pay. It's true, we authorise a single monthly payment but we will not take any money until you decide to continue with the service after your free trial.


You may cancel at any time during the trial by phoning Customer Services on 0333 123 8080. At the end of the free trial, you will be contacted by your dedicated account manager.


If you decide to continue with the service after the free trial, you will pay a monthly fee (for 12 months) includes free call minutes when the number is routed to a UK Landline.

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Buy 0300 & 0303 Phone Numbers Filter by Range:

FREE connection + £15.00 per month.
Click a number to add it to your basket.
0300 666 8580 03000 121 446 0300 777 6575
03000 121 447 0300 999 2535 0300 666 5110
0300 111 4664 0300 777 4774 0300 777 1221
0300 666 7570 0300 1111 252 0300 111 1001
0300 777 4480 0300 666 9339 0300 666 2620

0300 & 0303 Number CostsGoldPlatinumUltimate

030 Monthly Fee tick
030 Number Type tick
030 Connection Fee tick
030 Call Handling Packagetick
030 Call Statistics Package tick
030 Route to Landline onlytick
030 Route To Mobile only tick
Route to Landline & Mobile tick
030 Extra Landline Minutes tick
030 Extra Mobile Minutes tick
£15
Memorable
FREE
FREE
FREE
£25
Unforgettable
FREE
FREE
FREE
£40
Our Very Best
FREE
FREE
FREE
5000 Free minutes per month
250 Free minutes per month
+£10 per month (includes 5000 landline & 250 mobile mins) 
1.5p per minute (once free minutes are used up)
6p per minute (once free minutes are used up)

Why Windsor Telecom?

  • » We have been in business since 1997
  • » Thousands of delighted SME customers
  • » We aim to provide first class service
  • » Trusted by Ebay, BBC, Relate & RSPCA
  • » Tier 1 Networks, not VoIP

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About 0300 & 0303 Numbers

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Key Benefits »
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For details about how a not-for-profit or public services 030 number can work for you, please refer to out business page on the benefits of 0300 & 0303 telephone numbers.

Not a charity or not-for profit-organisation?
Find out more about our 03 numbers for business »

Costs associated with 0300 & 0303 numbers

Cost of Calling 0300 & 0303 Numbers from UK

Calls to 03 numbers cost no more than calls to geographic (01 and 02) numbers and must be included in inclusive minutes and discount schemes in the same way. Calls from landlines and mobiles are included in free call packages. It is also possible to call an 0300 or 0303 number from abroad.

How much does an 030 number cost?

Prices start from just £15 per month. More memorable 03 numbers cost more (i.e. platinum and ultimate numbers attract a higher monthly charge). You get 5000 free minutes when the 03 number is routed to a UK landline - this is enough for most small businesses. If you receive more calls then you simply pay 1.5p per minute for additional minutes.

Costs of Diverting Your 030 Number to a Mobile Phone

You can choose to route all calls to your mobile and receive up to 250 call minutes per month for no additional cost. Extra minutes used over the 250 limit are charged at just 6p per minute. If you wish to receive calls both your landline and mobile, select our Mobile250 package for an additional £10 per month. There is also the option to use our Pay as You Go service (perfect if you wish to divert to your mobile on an occasional basis) - diverted calls are charged at 9.95p per minute. View Mobile Divert Costs.

Fax To Email

You can also choose to use a 030 number as a Fax to Email line, where faxes are received via your email. This is a great alternative to having a fax machine, which is traditionally expensive what with the on-going maintenance and material costs. What's more, you don't need a physical landline if you choose Fax to Email, again, saving you a lot money.

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