Telephones - main lines in use:
7.936 million (2007)

Telephones - mobile cellular:
33.941 million (2007)

Telephone system:
general assessment: modern system in many respects; telecommunications sector liberalized during the 1990s; multiple providers of both fixed-line and mobile-cellular services; fixed-line connections stand at about 18 per 100 persons; mobile cellular usage is about 75 per 100 persons; competition among cellular service providers is resulting in falling local and international calling rates and contributing to the steep decline in the market share of fixed line services
domestic: nationwide microwave radio relay system; domestic satellite system with 41 earth stations; fiber-optic network linking 50 cities
international: country code - 57; submarine cables provide links to the US, parts of the Caribbean, and Central and South America; satellite earth stations - 10 (6 Intelsat, 1 Inmarsat, 3 fully digitalized international switching centers) (2007)

Radio broadcast stations:
AM 454, FM 34, shortwave 27 (1999)

Television - broadcast stations:
60 (1997)

Internet country code:
.co

Internet hosts:
1.554 million (2008)