Reverse dns how does it work

We get results like these:. The IP address space is hierarchical, just like the domain name space. But the most-significant digit is on the left of the IP address, unlike the most-significant part of the domain name, which is on the right.

This is the reason that the IP address A. The owner of the IP address space 8. Apparently Google is the owner of 8. With Vidrio. Tagged programming , networking. To ensure you get the best browsing experience, this website is using cookies. By using our website, you agree to our use of cookies. More Info. Reverse DNS is often unknown to domain name managers, especially when the names are hosted by major hosting companies. This is the exact opposite of the classic use of DNS , which associates domain names to IP addresses.

The resolution system is constructed in a similar way to the classic resolution. To perform DNS resolution, the IP address to be queried is configured in the reverse zone with the suffix. This would mean that writing www. Reverse DNS works the other way around. This zone is administered by whoever owns the block of IP addresses.

In the example case, the zone for the PTR record would be Fight the glaze spreading across your eyes! With a reverse DNS tool, you can translate these IP addresses into hostnames — many of which can result in meaningful leads.

However, because the business can be identified through a reverse DNS search, Leadfeeder can draw data about the company from LinkedIn. Of course, this is not always the case. While most IP addresses can be translated into hostnames, a lot of the time, that hostname is not very useful. According to a study from Deloitte, the average U. Your hostname will be something like You can even use this data to pinpoint a more accurate location inside Helsinki where the connection was made.

You can use the location data to better target regions with your marketing efforts or expand your business in those areas. Unlike the average Joe Rando, most companies have their own IP addresses. So, put on your thinking cap and consider what that means for your B2B marketing team looking to fully utilize the power of reverse DNS searches.

If the IP address is from a larger company, you can even see which offices their connection came from. Then, all you have to do is launch that LinkedIn retargeting campaign to zero in on the people with power — purchasing power!

Email servers use reverse DNS among other systems to verify that the sending server is not a malicious spammer. When someone sends an email from the address john.

In such cases, most servers reject the email.