Instructions for calling from the UK to international locations requires special calling codes that allow you to connect to countries outside of the United Kingdom.
Calling out to Cambodia
Here are the instructions on how to call the country of Canada from the United Kingdom.
To call Cambodia, dial 00855 and then enter the phone number of the person or location you’re trying to reach. If the phone number is displayed with a leading +855 omit the 855 and replace it with the UK international dialing code of 00. For example:
Phone Number in Cambodia
Dialed from the United Kingdom
+855 xx xxx xxx
00 xx xxx xxx
23 445 997
00 23 445 997
How to call the UK from Cambodia
To call a landline or mobile phone in the United Kingdon from Cambodia, dial 00x 44, then dial the UK phone number, minus the leading zero. For example: