Linked numbering scheme 1970-01-01
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Virtual queue 1970-01-01
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List of country calling codes 1970-01-01
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Crisis hotline 1970-01-01
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Local number portability 1970-01-01
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Long number 1970-01-01
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Permissive dialing 1970-01-01
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Personal mobility 1970-01-01
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Personal numbering 1970-01-01
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Phoneword 1970-01-01
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Plant test number 1970-01-01
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Premium-rate telephone number 1970-01-01
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Automatic number announcement circuit 1970-01-01
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Dial-a-joke 1970-01-01
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Dial plan 1970-01-01
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Emergency telephone numbers 1970-01-01
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Endymion (Simmons novel) 1970-01-01
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Loop around 1970-01-01
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RespOrg 1970-01-01
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Virtual number 1970-01-01
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