Brazil has 79% of its municipalities served by fiber optic networks. Anatel survey shows that, in 2020, there was a growth of at least 9% in the number of cities covered.

According to the most recent data from the mapping effort that has been carried out by Anatel to accurately survey which Brazilian municipalities are served by fiber optic networks, 2020 represented a growth of at least 9% in the number of cities served by fiber, or at least in cities where Anatel was able to point out the existence of this type of infrastructure. In all, according to Anatel's survey carried out with companies and associations, there are at least 4,403 municipalities served by fiber in Brazil, which represents 79% of Brazilian municipalities. As a result, 1,167 municipalities are not yet connected by fiber. The agency's survey is not exhaustive because there are cases of cities with unreported fiber networks, but it gives a good dimension to the current network. The survey considers municipalities served by infrastructure of high capacity telecommunications networks used in the provision of telecommunications services (backhaul). The survey continues to receive contributions.

According to the agency, "small providers (...) are already present with optical fiber in 3,777 municipalities, of which 1,108 of these municipalities are served by fiber only by these small providers, which corresponds to 20% of the country's municipalities". Also according to the agency, "not all structural resources (including the backhaul) of the providers are available for wholesale resale, that is, the fact that a provider has infrastructure with optical fiber in a municipality does not mean having conditions or service obligations to the wholesale market ". Anatel's table with the municipalities and number of providers is available here.