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A reverse lookup zone usually has name format x.x.x.in-addr.arpa, where x.x.x is the first three octets of the IP address in reversed order. For example, the zone 0.168.192.in-addr.arpa below is a Reverse Lookup Zone:
26 kwi 2023 · DNS also provides a reverse lookup process, in which clients use a known IP address and look up a computer name based on its address. A reverse lookup takes the form of a question, such as "Can you tell me the DNS name of the computer that uses the IP address 192.168.1.20?"
What is a Reverse Lookup Zone? A reverse lookup zone contains mapping from an IP address to the host (the opposite function of most DNS zones). These zones are used for troubleshooting, spam filtering, and bot detection.
15 kwi 2024 · It is primarily used for reverse DNS lookups to resolve IP addresses to domain names. They contain PTR (pointer) records to associate IP addresses with corresponding hostnames. Let’s visualize a reverse lookup zone named 1.168.192. in-addr.arpa created to map IP addresses within the 192.168.1.0/24 subnet to hostnames.
Reverse DNS lookups for IPv4 use a reversed IP address (to work within the hierarchical structure of DNS) in the zone in-addr.arpa. So to provide answers to queries against, for instance, 192.0.2.0, a DNS server should answer for 0.2.0.192.in-addr.arpa.
What is reverse DNS? A reverse DNS lookup is a DNS query for the domain name associated with a given IP address. This accomplishes the opposite of the more commonly used forward DNS lookup, in which the DNS system is queried to return an IP address.
In computer networks, a reverse DNS lookup or reverse DNS resolution (rDNS) is the querying technique of the Domain Name System (DNS) to determine the domain name associated with an IP address – the reverse of the usual "forward" DNS lookup of an IP address from a domain name. [1]
