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Learning DNS for Developers

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amazon.com 216.73.216.1 Your IP DNS Lookup DNS Propagation Checker SPF Record Lookup A Record Lookup AAAA Record Lookup CNAME Record Lookup TXT Record Lookup MX Record Lookup

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c-50-172-219-42.unallocated.comcastbusiness.net PTR records

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No PTR records No PTR records found for c-50-172-219-42.unallocated.comcastbusiness.net.

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