Calling code: +504[1] International call prefix: 00[4] Main lines: 610,000 lines in use, 91st in the world (2012).[1] Mobile cellular: 7.4 million lines, 93rd in the world (2012).[1] Telephone system: fixed-line connections increasing but still limited; competition among multiple providers of mobile-cellular services is contributing to a sharp increase in subscribership; beginning in 2003, private sub-operators allowed to provide fixed-lines in order to expand telephone coverage contributing to a small increase in fixed-line teledensity; mobile-cellular subscribership is roughly 100 per 100 persons; connected to Central American Microwave System (2011),[1] a trunk microwave radio relay system that links the countries of Central America and Mexico with each other.[5] Satellite earth stations: 2 Intelsat (Atlantic Ocean).[1] Communications cables: Landing point for both:[1] the Americas Region Caribbean Optical-ring System (ARCOS-1) linking US, Mexico, Belize, Guatemala, Honduras, Nicaragua, Costa Rica, Panama, Colombia, Venezuela, Netherlands Antilles, Puerto Rico, Dominican Republic, Turks and Caicos Islands, and the Bahamas, and the MAYA-1 linking the US, Mexico, Cayman Islands, Honduras, Costa Rica, Panama, and Colombia.