Given that the canonical format for a U.K. phone number looks like
this:
+44 (20) 8111-1111
why do many U.K. companies and individuals put phone numbers on
their web pages and letterhead that look like this:
+44 (0) 20 8111-1111
(020) 8111-1111
Similarly, freephone (toll-free) numbers in the U.K. are almost
always listed like this (a number for help with The Big Number, by
the way):
0800 731 0202
Indeed, the official explanations of The Big Number (see More
Information below) include the leading zero as part of the new
area codes.
The extra zero -- (0) in the first example, and the leading 0 in
0800 in the second example -- reflects the way people who
live in the U.K. actually think about dialing numbers. To dial a
long-distance number, they dial a 0 first. The same applies to
freephone/toll-free and mobile numbers. Because no emphasis was ever
placed on the leading 0 being a dialing code, it has
generally come to be considered part of the city code. So it would
not be unusual for someone living in London to tell a friend
visiting from New York that their number is 020 8111-1111, but add,
"You should leave off the zero when you get home to New York
and need to dial me from the States."
So what would happen if you entered a number like this in
Outlook:
+44 (020) 8111-1111
using the commonly accepted 020 area code for London? If you had
entered 020 as your local area code in the Windows dialing
properties location, then number would be dialed correctly as
8111-1111. However, if you went somewhere else in the U.K and
used a Windows dialing properties location with a different area
code, Outlook would dial the number as
0 020 8111-1111
adding the 0 dialing prefix for long-distance numbers within the
U.K. That call would not go through because of the extra zero. From
outside the U.K, the number would be dialed as
44 020 8111-1111
Again, that means the call would not go through, since for
international calls, then number should be dialed as
44 20 8111-1111
Mobile numbers are a little different. Within the U.K., you
always include the leading 0 then the area code for a mobile
number. Therefore, you probably would not want to put the mobile's
area code in your Windows dialing properties. Instead, use your
local landline area code.
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