0871 numbers come under the control of UK phone regulator PhonePayPlus (formerly ICSTIS), this is true of most UK revenue earning numbers and is necessary to protect callers and operators. Basically, PhonePayPlus publish a code of conduct that companies must follow when using 0871 number, if complaints are received and the company is found to have failed to adhere to the code of conduct then they are liable to be fined by PhonePayPlus.
The PhonePayPlus documentation is available at http://www.phonepayplus.org.uk/upload/087-Help-Note.pdf, we have produced summary of the main areas:
To get a 0871 number for your business then you will need to register with PhonePayPlus as a Servicxe provider, this is quick and easy just goto http://www.phonepayplus.org.uk/output/Register-as-a-Service-Provider.aspx, for more details on the PhonePayPlus 087 quidlines then see http://www.phonepayplus.org.uk/output/087-Number-Range.aspx.
If you need an 0871 Number, please call us 0870 626 0626.