5 Best Free Online Bulk Reverse DNS Lookup Websites

Here is a list of the best free online bulk reverse DNS Lookup websites. A DNS lookup gets you the IP address(es) associated with a domain. Reverse DNS lookup is exactly the opposite of that. A reverse DNS lookup (rDNS) takes an IP address and queries for the domain name associated with that IP address. It does a little more than DNS lookup. A reverse DNS lookup tool also provides additional information, such as the country, city, country, code, TTL, ASN, ISP, coordinates, etc.

This post covers 5 websites where you can perform bulk reverse DNS lookups for free. You can add multiple IP addresses and check those out at once. The maximum number of IP addresses you can check simultaneously changes from site to site. These websites can check up to 5, 20, 100, and more IP addresses in one go. I suggest you should go through the post and check them out in detail. That can help you find a website that suits your needs.

My Favorite Online Bulk Reverse DNS Lookup Website

InfobyIP.com is my favorite website to reverse DNS lookups in bulk. This website can check up to 20 IP addresses at once for free. And for those IP addresses, it queries Domain, Country, Reason, City, ISP, ASN, Coordinates, and more. This allows you to learn more about the associated domain rather than getting just a URL.

You can check out our other lists of the best free Online SPF Record Checker Websites, Online DKIM Record Generator Websites, and Online DMARC Record Generator Websites.

InfobyIP.com

InfobyIP.com is a free website to reverse DNS lookup IP addresses in bulk. You can simply add the IP addresses that you want to check into the tool. Additionally, if you want to look up MS, NS, TXT, A, AAAA, or CNAME, you can select that as well. In the output, this tool gives you the domain linked with the IP address along with Country, Reason, City, ISP, ASN, Coordinates, etc. From there, you can export the results to XML, CSV, JSON, or YAML.

How to perform a reverse DNS lookup on InfobyIP.com?

• Follow the link given below leading to the IP bulk lookup tool.
• Add the IP addresses that you can to check into the box there.
• Mark if you like to perform additional checks or not.
•  After that, click the Lookup button to get the results.

Highlights:

• This tool can look up the Domain, Country, Reason, City, ISP, ASN, and Coordinates of the given IP.
• Marks the IP locations on the map.
• Plots graphs of host distribution by country and ISP.
• Export the reverse DNS results to CSV, JSON, XML, and YAML.

ShowMyIP.com

ShowMyIP.com offers a free IP lookup tool that you can use to run reverse DNS lookup. This tool can check up to 100 IP addresses at a time. In the output, it gives you a table covering the Domain, Country, City, Region, ISP, Org, and Geo-Coordinates. For all given IP addresses, it shows the data points it can find. Along with that, it also plots the approximate location of each IP address on the map.

How to perform a reverse DNS lookup on ShowMyIP.com?

• Head over to this bulk IP lookup tool using the link given below.
• Add the IP addresses that you can to check into the box there.
• Then complete the captcha and click the Lookup button to get the results.

Highlights:

• This tool can look up the Domain, Country, City, Region, ISP, Org, and Geo-Coordinates of the given IP.
• It can reverse lookup up to 100 IP addresses at once.
• It marks the approximate location on the map.
• Export the reverse DNS results to CSV.

ipapi.co

ipapi.co is another good website to reverse DNS lookup in bulk. This tool fetches a collection of data points such as Domain, Country, City, Region, Continent, Postal, Code, Org, ASN, Coordinates, etc. You can add up to 20 IP addresses and check them all at once. While doing so, you have the option to pick the output format of your choice. The options for output format includes CSV, JSON, XML, YAML, and HTML + Google Maps. If you go with the HTML + Google Maps option, it also plots the approximate locations of the IP addresses on the map.

How to perform a reverse DNS lookup on ipapi.co?

• Use the link given below to open this IP lookup tool directly in your browser.
• Add the IP addresses that you can to check into the box there.
• Pick the format for the output and then click the Submit button to get the results.

Highlights:

• This tool can look up the Domain, Country, City, Region, Continent, Postal, Code, Org, ASN, and Geo-Coordinates of the given IP.
• It marks the approximate location on the map.
• It can check up to 20 IP addresses simultaneously.
• Options to get the reverse DNS results to CSV, JSON, XML, and YAML format.

DNSIssue.com

DNSIssue.com has a free online bulk reverse DNS lookup tool. This tool can look up multiple IP addresses at once. It can try to fetch the domain name, country, ISP, and MX data. You get the options to which of these data fields you want to fetch in the output. When you run the check, it shows the selected types of data of given IP addresses on the screen. Just below the data, you get options to download it into a CSV or JSON file. Along with that, this tool also supports lookup of A, AAAA, MX, NS, and TXT DNS records for multiple domains.

How to perform a reverse DNS lookup on DNSIssue.com?

• Go to the DNSIssue’s bulk DNS lookup tool using the link given below.
• Add the IP addresses that you can to check into the box there.
• Then select MX as in the DNS record type dropdown and check the duplicate entries options accordingly.
•  After that, click the Lookup button to get the results.

Highlights:

• This tool can look up the Domain, Country, ISP, and MX record of the given IP.
• Option to preserve duplicate entries in the results.
• Export the reverse DNS results to CSV or JSON.

BacklinkBalidator.com

BacklinkBalidator.com has a Reverse DNS Lookup Online. This is a simple tool where you can perform reverse DNS lookup in bulk. You can add up to 5 IP addresses and check them all at once. The checks returns with the domain and TTL associated with those IP addresses. In case a PTR record doesn’t exist for an IP, it lists that IP separately. This tool does not offer any export options but you can copy-paste the results directly to Excel, Google Sheets, etc.

How to perform a reverse DNS lookup on BacklinkBalidator.com?

• Use the link given below to open this Reverse DNS Lookup Online.
• Add up to 5 IP addresses that you want to check.
•  After that, click the Check rDNS button to get the results.

Highlights:

• This tool can look up the domain and TTL of the given IP addresses.
• It can lookup up to 5 IP addresses at once.