The UK legislation, which came into effect on 13th June 2014, requires affected businesses to switch to lower cost “basic rate” prefixes for enquiries from customers. Permitted basic rate numbers include those which start with the digits 01, 02 and 03, mobile numbers and those which are free-to-caller from fixed and mobile telephones.
In summary, the guidance says that these number types are allowed:
- Geographic rate numbers, which means any number which starts 01, 02 or 03.
- A number which is free to call from all fixed and mobile telephone services, which will be 0800 or 0808 when the changes Ofcom has in the pipeline are applied in June 2015.
- A mobile telephone number, which is prefixed 07 (except the 070 and 076 sub-prefixes)
- Premium Rate Service (PRS) ranges which start with 0871, 0872, 0873 and 09.
- Other numbers that also convey a Service Charge, but which aren’t PRS; these are prefixed 0843, 0844 and 0845.
- Numbers which start with 0870.
No unsolicited PMs or emails unless you're planning on asking for paid help.