The XO Network spans the world, with network and peering arrangements second to none. They provide enhanced connectivity between Europe and the US. Their UK network connects directly into their own European network, with core routing centres in Amsterdam, Paris, Frankfurt and Stockholm located in major traffic exchange centres such as AMSiX in Amsterdam and Telehouse in Paris. Both of XO's London core routing centres connect into the US via two separately provisioned transatlantic links of up to STM-4 (622Mb/s) capacity.

The core US backbone consists of dual, cross connected links between major network nodes, with a secondary backbone of routing points in major cities with dual connections into the key backbone.