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Learning DNS for Developers

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amazon.com 216.73.216.59 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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194.57.138.147 Reverse DNS

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1 Issue

This IP has multiple PTR records

smtp20.cnrs.fr
si-svc-prod-smtp1.mailing.cnrs.fr
smtprelaysi.cnrs.fr