646-873-6606 seems to be a landline phone number, which is registered by the company called New Cingular Wireless Pcs, Llc - DC. The phone number probably located in New York (New York), based on its area code. If you want to know more, you should check out other publicly available sources (e.g.: yellow and white pages, phone books).
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Long Version: | Six Four Six Eight Seven Three Six Six Oh Six |
Short Version: | Six hundred forty-six, Eight hundred seventy-three, Sixty-six, Oh six |
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