The service for determining from which number a client has called. This helps to decide how to answer on the incoming call. A telephone company sends DNIS number to the telephone client’s system during establishing connection. As a rule, DNIS number consists from 4 to 10 digits.
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United States 1294
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Pakistan 134
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United States 1294 India 440 United Kingdom 425 Canada 348 Bangladesh 338 China 142 Pakistan 134 Australia 133 Spain 123 Russia 114