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Learning DNS for Developers

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amazon.com 216.73.216.155 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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213.132.103.221 Reverse DNS

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This IP has multiple PTR records

221.208-223.103.132.213.in-addr.arpa
smtp1.wx3.se