0800 numbers are used for freephone services in the United Kingdom.
They are usually in the format of 0800 xxx xxxx, with a total of 10 digits after the trunk code (the initial '0').
However, some older 0800 numbers allocated before PhONEday, in April 1995, are in the format 0800 xxxxxx, so they only have 9 digits after the trunk code.
There is one special short 0800 number - the number for the charity Childline, which is 0800 1111.
0800 numbers are normally free to call from a land line, but are often not free when called from a mobile phone, in which case the charge is typically from 14p to 40p per minute.
If a charge is to be levied, the operator must inform the caller before the call is connected.
More information on individual 0800 numbers can be found by browsing the 0800 number list.
Other freephone numbers in the United Kingdom are 0808 numbers and 0500 numbers.
0800 numbers can begin as follows:
The correct way to write telephone numbers beginning 0800 is in the format <b>0800 xxxxxx
A table of the code allocations for numbers starting 0800 is available