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by Dave Roos

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    The Public Switched Telephone Network
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    The Telecommunication Standardization Sector
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    The Numbering Plan E.164
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    Lots More Information

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    Please copy/paste the following text to properly cite this HowStuffWorks article:

    Roos, Dave.  "How Telephone Country Codes Work"  07 February 2008.  HowStuffWorks.com. <http://electronics.howstuffworks.com/telephone-country-codes.htm>  22 May 2012.
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    Introduction to How Telephone Country Codes Work
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    The Public Switched Telephone Network
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    The Telecommunication Standardization Sector
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    The Numbering Plan E.164
  • 5
    Lots More Information

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