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 Luxembourg
Here are the instructions on how to call the country of Canada from the United Kingdom.
To call Luxembourg, dial 00352 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 +352 omit the 352 and replace it with the UK international dialing code of 00. For example:
Phone Number in Luxembourg
Dialed from the United Kingdom
+352 xxxx
00 xxxx
2664
00 2664
How to call the UK from Luxembourg
To call a landline or mobile phone in the United Kingdon from Luxembourg, dial 00 44, then dial the UK phone number, minus the leading zero. For example: