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National Radio Network ( NRN ) was a commercial radio network in United States . It was owned and operated by Langer Broadcasting, which is located in Framingham, Massachusetts , and was operated from flagship station WSRO . The network primarily relied on other networks, including CRN Digital Talk Radio Networks and the USA Radio Network , to provide programming over a very limited network of affiliates. It ceased operations in 2010 when WSRO switched to Portuguese language programming.

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• National Radio Network

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