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A PTR record or pointer record maps an IPv4 address to the canonical name for that host. Setting up a PTR record for a hostname in the in-addr.arpa domain that corresponds to an IP address implements reverse DNS lookup for that address. For example www.name.net has the IP address 122.0.3.16, but a PTR record maps 16.3.0.122.in-addr.arpa.
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DNS Records Explained with Syntax and examples, DNS Records Tutorials
Preference numbers, the client simply attempts all equal Preference servers in random order, and then goes to MX record with the next highest Preference number. PTR Record <span>A PTR record or pointer record maps an IPv4 address to the canonical name for that host. Setting up a PTR record for a hostname in the in-addr.arpa domain that corresponds to an IP address implements reverse DNS lookup for that address. For example www.name.net has the IP address 122.0.3.16, but a PTR record maps 16.3.0.122.in-addr.arpa. Example of PTR Record with syntax 16.3.0.122.in-addr.arpa. IN PTR name.net Here as you see the IP Address is reversed and added with in-addr.arpa &


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