DNS Lookup tool searches the Root server to identify the TLD and DNS server responsible for returning DNS records for the domain name, and retrieves DNS records. There are a variety of DNS records, and A, CNAME, TXT, and MX lookup are amongst most popular. With gaining popularity of IPv6 addresses, the AAAA record lookup will gain popularity.
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Some of the most popular public DNS servers used by many organizations include:
If you wish to check your domain on less popular DNS servers, you may choose Custom from our dropdown list, and enter a fully-qualified domain name or IP address of the DNS server to retrieve results.
Every computing device on the Internet gets an IP address, and this unique IP address identifies itself and communicates with other devices. An IP address is made of 32-bit (IPv4) or 128-bit (IPv6) number, and this number is hard for humans to remember. The DNS is developed to convert the IP addresses to more memorable domain names and vice versa. There are two types of lookup that can be performed: forward lookup and reverse lookup.
The forward lookup is using a domain name to lookup an IP address. We, as humans, cannot remember lengthy numbers and therefore use domain names instead. When we visit www.google.com, the DNS lookup the domain name and returns the IP address of the corresponding domain name. This is most commonly used DNS lookup.
The reverse lookup is using an IP address to lookup a domain name. This is typically used by email servers to identify the receiving server, and filter possible spammers.
DNS records are defined in a zone file, and it contains the instructions on how to handle the DNS requests for a domain name. A DNS record mapping a domain name to an IP address or relevant information. The DNS record types include A, AAAA, CNAME, TXT, MX, NS, PTR, SRV, SOA, CAA, DS, DNSKEY and more.
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