Prefix 00 was reserved for international calls, while prefix 9 was assigned to special numbers, such as 9-1-1. Toll-free numbers starts with 800 followed by 7 digits while premium rate numbers starts with 900 followed by 7 digits.
9
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9 1 1 - Costa Rica Phones - Find Mobiles and Phone Companies
9 1 1 - Costa Rica Phones - Find Mobiles and Phone Companies