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 El Salvador
Here are the instructions on how to call the country of Canada from the United Kingdom.
To call El Salvador, dial 00503 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 +503 omit the 503 and replace it with the UK international dialing code of 00. For example:
Phone Number in El Salvador
Dialed from the United Kingdom
+503 xxxx xxxx
00 xxxx xxxx
00 2133 6443
How to call the UK from El Salvador
To call a landline or mobile phone in the United Kingdon from El Salvador, dial 00 44, then dial the UK phone number, minus the leading zero. For example: