What is reverse DNS and where can you update reverse DNS for your IP is the subject explored below. Take a look.

What is reverse DNS?

A DNS query for the domain name associated with a given IP address is known as a reverse DNS lookup. This achieves the inverse of the more widely used forward DNS lookup, which queries the DNS system for an IP address.

The Internet Engineering Task Force (IETF) recommends that any domain be able to perform reverse DNS lookups, but this is not a hard requirement because reverse lookups are not needed for the normal operation of the Internet. As a result, reverse DNS lookups aren’t widely used.

Question:- Where do I update rDNS for my IP?

Answer:- The authoritative nameservers for the IP range in question would need to update rDNS. This is either the hosting company or the internet service, provider. One way to find out where your IP’s rDNS is being served is to use the dig button. Here’s a sample command to see if this is true. We can see from this performance that the Google nameservers host the rDNS for the 216.58.193.0/24 IP set, specifically IPs 216.239.38.10, 216.239.34.10, 216.239.32.10, and 216.239.36.10.

# dig +nssearch 193.58.216.in-addr.arpa
SOA ns1.google.com. dns-admin.google.com. 327928838 900 900 1800 60 from server 216.239.38.10 in 27 ms.
SOA ns1.google.com. dns-admin.google.com. 327978237 900 900 1800 60 from server 216.239.34.10 in 28 ms.
SOA ns1.google.com. dns-admin.google.com. 327978237 900 900 1800 60 from server 216.239.32.10 in 29 ms.
SOA ns1.google.com. dns-admin.google.com. 327978237 900 900 1800 60 from server 216.239.36.10 in 29 ms.

Using the following command to find the authoritative source of rDNS for IP 1.2.3.4. The IP’s octets have been inverted, and the 4th octet has been omitted.

dig +nssearch 3.2.1.in-addr.arpa

We have a guide to get you started if you own your IP block and want to use your WHM/cPanel server as the authoritative source of rDNS for your IPs. 

https://docs.cpanel.net/knowledge-base/dns/how-to-configure-reverse-dns-for-bind-in-whm/

We sincerely hope that you must now have got a clear idea regarding What is rDNS and where can you update rDNS for my IP. However, if you are still facing any difficulty in the procedure mentioned above, feel free to reach out to the Host.co.in Team for proactive support 24×7.