This is a question I was asked recently and it illustrates
just how confusing the current 08 number range is, covering everything from
free calls to premium rate.
Within the UK
numbering plan, the 08 prefix was set aside for special rate calls, a tag that
can cover a multitude of sins. Back in the day, when your choice was a BT
landline or a BT landline, calls to 0800 numbers were free (with the number's
owner picking up the tab) and 0845 were designated as "Lo Call" and
were always charged at local call rates.
With the liberalisation of telecoms, many
more operators started up and offered new services and tariffs, so that today
we have a much more complicated picture. The standard for what you should be
charged for a call is still the BT landline, but it can actually vary between
operators, especially mobile operators and will also depend on what inclusive
call packages you have.
A simplified view is:
080 numbers are free to the caller from a standard landline,
but mobile operators, for example, may make a charge to cover what they perceive to be a reasonable
cost for use the of the air channel. Vodafone sets this at 14
pence per minute. If an operator does levy a charge, they must include an
"advice of charge" message before the call is routed and allow you to
end the call before charging starts.
0843, 0844 numbers should be no more than 4.26p per minute
or per call from a BT landline, but the charge made by other operators may be
different.
0845 numbers should be charged at the BT local call rate, but
the charge made by other operators may be different.
Surprisingly, perhaps, 0870 numbers, which have been the
source of much controversy, should cost you no more than calling a normal
geographic number (01, 02 prefix), and furthermore, if you have an inclusive
call package, calls to 0870 numbers must count towards your inclusive call
minutes.
0871,0872,0873 numbers are higher rate special services and
will cost you up to 8.51p per minute from a BT landline and may be more from
other operators.
If you have an inclusive call package, then except 0870 numbers, your calls to other 08 numbers are not likely to be included.
You may have heard that in June this year, a new regulation
was introduced governing the use of higher rate numbers for customer support
lines. If you need to contact your supplier in connection with a purchase you
have made, you cannot be charged more than the normal geographic rate for your
call, which has effectively ruled out most of the 08 number range for this
purpose.
In June 2015 we will see a further development which is
intended to make it clearer who is charging you what, with the connection
service charges being separated out. This will be quite useful when you come to
look at your bill, but it remains to be seen how much it helps you to
anticipate before hand how much a call to a particular number will cost. The
good news, though, is that as part of this change, calls to 080 numbers will
become free to the caller wherever they call from, including mobiles.
See also Ofcom's page on telecoms numbering