Renesys Corp recently rated Level(3) as the #1 bandwidth provider in the world. They are one of the largest and most advanced Tier 1 telecommunications networks worldwide.
NTT Communications runs a top Tier 1 IP backbone that provides direct connections to major ISPs in several global networks including Europe, Asia, Oceania and the United States.
TeliaSonera, recently ranked the #3 bandwidth provider worldwide, provides network access and telecommunications services across a large region from the Nordic and Baltic countries, throughout Europe and Eurasia.
GTT operates a global Tier 1 network, recently ranked 4th worldwide, with the most interconnected Ethernet service platform around the world. They provide highly reliable, scalable and secure cloud networking services with simplicity, speed and agility.