XO Communications, LLC owns and operates an integrated fiber optic network that provides telecommunications services in the United States markets. The company provides wire line voice and data telecommunications services, including local and long distance voice, prepaid calling card processing, interactive voice response systems, Internet access, private data networking, and hosting services. It also provides voice over Internet protocol, network transport, and broadband wireless access services to government, small and medium businesses, multi-location businesses, and large enterprises, and carrier and wholesale service providers. The company is based in Columbus, Ohio. XO Communications, LLC operates as a subsidiary of XO Holdings, Inc.