Remove dead phone numbers

Hi,<br /><br />Really need some help! I have a list of 999 mobile numbers in an excel spreadsheet, i need a program to ping each number in the list, then create two lists one with all the 'dead' numbers and one with all the 'live' numbers.<br />The numbers themselves will be UK mobile numbers.<br />Have tried to search for an answer to this problem, but no luck. Please help.<br /><br />Regards<br />Shazad
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