MainOne cable system is a 7,000km submarine cable with landing stations in Nigeria, Ghana, Senegal and Ivory Coast and Portugal, with reserved branching units Morocco, Canary Islands.

MainOne cable system is the first private subsea cable along the West African coastline, owned by MainOne Cable Company based in Nigeria. The MainOne cable was satrted to construct in February 2008 and launched for commercial service in 2010. MainOne cable system was supplied by TE SubCom.

The MainOne cable system has been proven to provide capacity of at least 4.96 Tbps.

The MainOne cable system interconnects with TGN Western Europe and other international cables at the Seixal CLS in Portugal, extends to MainOne PoP at Telehouse North, London via Tata Communications’ European networks, delivers Africa-US connectivity via TGN Western Europe + TGN Atlantic.

In September 2018, Orange announced to invest in the MainOne cable system, constructing two new branches and stations connecting the MainOne cable to Dakar in Senegal and Abidjan in the Côte d’Ivoire.

In December 2021, Equinix announced to acquire MainOne Cable Company for US$320million. The transaction was closed in April 2022.