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Carriers

Operators that move somebody else's traffic. The physical substrate everything above them assumes, and the reason several entries here are really about rights of way and undersea cable.

2 companies

1897 - presentMarconi - wireless itself, then the bubbleGuglielmo Marconi bridged the Atlantic in 1901; a century later the company bearing his name became telecom's starkest dot-com cautionary tale, carved up by Ericsson in 2006.vendor

1968 - presentLumen, CenturyLink, Level 3 and Global CrossingA rural Louisiana phone company that ended up owning one of the internet's largest backbones.

All companies, in order