tw telecom inc., together with its subsidiaries, provides managed network services in the United States. The company specializes in business Ethernet, data networking, converged, Internet protocol (IP) based virtual private network (IP VPN), Internet access, and voice, including voice over IP (VoIP), as well as network security services. It delivers a portfolio of data networking services, including Ethernet bandwidth, and integrated and managed network solutions; data and Internet services comprising Ethernet, managed services, Internet services, and integrated services; and voice services that provide customers with local, local toll, and long distance calling capabilities. The company also provides a range of network access services with transmission speeds up to 10 gigabits per second, using Ethernet, synchronous optical network, and dense wavelength division multiplexing standards in various configurations and capacities to meet customers needs for voice, data, image, and video transmission. In addition, it interconnects with other telecommunications carriers to originate and terminate long distance calls and terminate local calls for other carriers. As of December 31, 2013, the company s fiber network spanned approximately 30,000 route miles connecting to 20,255 buildings. Its customers include enterprise organizations, such as public sector entities and carriers. The company was formerly known as Time Warner Telecom Inc. and changed its name to tw telecom inc. in March 2008. tw telecom inc. was founded in 1993 and is headquartered in Littleton, Colorado. As of October 31, 2014, TW Telecom Inc. operates as a subsidiary of Level 3 Communications, Inc.