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There is no 324 area code in the United States, but many people nationally have reported receiving scam calls that showed up on their caller ID systems as originating from the 324 area code. One Internet source, wikianswers.com, reports the calls appear to be originating from Ghana, West Africa. A Northern Oklahoma businessman said he recently encountered an apparent credit card scam that used the 324 area code. A man who identified himself as Preacher Tim from Idaho tried to get the businessmanto send 600 blankets to an orphaage in Idaho, he said. The scams reportedly take many forms, but a call that appears to originate from a 324 area code should be cause for suspicion, unless a person is expecting a call from Ghana.

http://blog.newsok.com/watchdog/2010/03/08/324-area-code-warning/

You can do a search of area code at http://www.phonecodelookup.com.