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Domains DNS servers IPs

Learning DNS for Developers

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amazon.com 216.73.216.138 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 DNS History

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smtp1-ext.iad2.corp.rackspace.com SPF record

Queried just now

DNS resolution error Querying SPF record for smtp1-ext.iad2.corp.rackspace.com failed.

check TXT records