The Bahrain Telecommunications Regulatory Authority (TRA) is a governmental institution which regularly updates and publishes reports on the country's national numbering plan. The reports include all the number blocks used in the Kingdom of Bahrain. Telephone numbers in Bahrain are generally eight digits long with the exception of short codes which have fewer digits. Majority of the fixed land line numbers start with 1. Cellular (Mobile) phone numbers and pager numbers start with 3* or 663* or 669* depending on the service provider.