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[20] In Romania, toll-free numbers have the format "0800 xxx xxx". The service is referred to as număr verde. In Russia, the prefix is "8-800", followed by 7 digits (8-800-XXX-XX-XX). In Serbia, the prefix "0-800", followed by a 6 or 7 digit number, is used. In Singapore, the prefix "1800" followed by a 7 digit number is used. Calling from a ...
For numbers in the Île-de-France surrounding Paris, the old codes 3x and 6x joined the old seven-digit numbers to become eight-digit numbers and were assigned to the Paris area code 1, with the trunk prefix 16 required for calls from the rest of France, followed by the area code 1 for Paris and the eight-digit number. [10]