The United Kingdom has its own toll-free or "freephone" telephone number system, similar to the 800-number system in the US. It is usually designated by the prefix 0800 or 0808.
The first 0800 telephone service trials began in 1985, using the name Linkline. The Linkline name was eventually marketed as Freefone or Lo-Call, to signify the fact that costs were low or nonexistent. However, in the UK, mobile phone operators are allowed to charge for calls to freephone numbers, but there is still no charge if calling from a landline telephone. The charges do not have to be explicitly stated by the phone company.