Calling code: +231 [citation needed] International call prefix: 00[19] Main lines: 3,200 lines in use, 213th in the world (2011).[2] Mobile cellular: 2.4 million lines, 138th in the world (2012).[15] Telephone system: the limited services available are found almost exclusively in the capital Monrovia; fixed-line service stagnant and extremely limited; telephone coverage extended to a number of other towns and rural areas by four mobile-cellular network operators; mobile-cellular subscription base growing and teledensity reached 50 per 100 persons (2011).[15] Satellite earth stations: 1 Intelsat (Atlantic Ocean) (2010).[15] Communications cables: Africa Coast to Europe (ACE) cable system, links countries along the west coast of Africa to each other and on to Portugal and France.[20]