How many possible combinations of phone numbers are there in the US ?

Subject: How many possible combinations of phone numbers are there in the US ?

Date: Tue Feb 15 08:19:47 2000
Posted by Brian
Grade level: 7-9 School: Ramblewood Middle Schoo;
City: Coral Springs State/Province: Fl Country: US
Area of science: Other
ID: 950624387.Ot

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Re: How many possible combinations of phone numbers are there in the US ?

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