CURL cannot connect to URL - IP address - after successful connection

["ioannes@xxxxxxxxxxxxxx" <ioannes@xxxxxxxxxxxxxx>]

I can return a target page - once, but then on refresh within a few 
hours the script curl_error is that it cannot connect to the host and 
return is empty.  The target URL is an ip address, not a named url, so 
maybe it has something to do with DNS.  I am on a shared server.  Any 
ideas on why this happens?

John

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