Bill Hartzer

SEO Testing: TLD Bias in Search

As a search engine optimization (SEO) and domain name consultant, one of the questions I get asked most often about domain names is whether or not the domain name or TLD (Top Level Domain) matters. Will the domain name ending have an effect on SEO or search engine rankings. Are certain domain name endings preferred by the search engines over other domain name extensions? I decided to answer this question based on search engine optimization testing and not just based on my personal and professional experience.

In order to begin to answer this question we have to register domain names, set up websites, set up unbiased SEO testing software, and track the results. That’s exactly what I did—and I used the help of two different organizations, Digitaleer and SIA (SEO Intelligence Agency). Clint Butler from Digitaleer help set up and monitor the testing, SIA helped provide the software and testing, and Hartzer Consulting provided the analysis for this research.

I recorded a YouTube Video below about the test results:

SEO TLD Domain Test Methodology

In order to properly test, in an unbiased way, whether or not the domain name ending has any impact on indexing and search engine rankings, we set up SEO testing. We will call them TLDs Top Level Domains going forward in this document. The methodology we used was the following:

Before I chose the domain names and the TLDs for the testing, I consulted with several domain name industry professionals and domain name investors. I wanted to make sure that the TLDs that were picked were acceptable for the test. Several recommended that .COM, .NET, and .ORG be used in the testing, as well as ccTLDs be used, as well. I chose the most popular new gTLDs based on domain name registrations, as well as popular ccTLDs (country code TLDs). I used data from nTLDSTats to help with these decisions.

Ultimately, the following TLDs were chosen for the test:

I “randomly” chose a made-up word that does not exist. In picking the word for each domain name, I chose the name of a popular domain name conference, NamesCon, and spelled it backwards. At the time of domain name registration, there were only 16 search engine results for this made-up word in’s search engine results, so it was a good prospect to use. It’s important to note that the keywords chosen (one per website) are not related in any way to the made-up word (NamesCon backwards). We didn’t try to rank for “nocseman” as a keyword, and that keyword is only present in the domain names. It is not present anywhere on the websites that were built.

Initially we wanted to test the indexing of each of the websites. We let the websites sit for a certain number of days and then when they weren’t indexed (no pages were indexed), we verified the websites in Google Search Console and manually submitted one page for website. Then, after a certain number of days, we used SEO indexing software to help index the rest of the pages that were not indexed. There were 25 pages per domain name for a total of 375 web pages.

We also tracked the search engine rankings of each keyword, one keyword was assigned per domain name.

We monitored the progress and reported the results in a few ways:

Timeline of the SEO Testing

We took several days to perform the SEO testing of these Top Level Domains. We initially registered the domain names, created the websites, watched the indexing process of all pages, and the looked and analyzed the search engine rankings. Here is the timeline for the SEO testing:
December 27, 2019 – domain names registered
December 30, 2019 – websites went live
December 31, 2019 – SEO test software set up and started tracking/monitoring
January 9, 2020 – No pages indexed.
January 9, 2020 – All sites verified in Google Search Console using html verification file.
January 9, 2020 – One page of each site manually submitted via URL Inspection Tool in Google Search Console.
January 9, 2020 – All submitted pages indexed within minutes.
January 13, 2020 – All pages on all domains submitted via a search engine indexer tool.
January 15, 2020 – SEO Testing concluded.

SEO TLD Domain Test Results

Once the domain names were registered, the websites were set up, and the SEO testing software was in place, I tracked the progress, made some adjustments to the indexing process. For example, it was necessary to verify the websites in Google Search Console and manually submit one page using the URL Inspection Tool in Google Search Console. We previously had also tried to force indexing by submitting one page from each website using the Mobile Friendly Test tool by Google. That did not work, so we were forced to use the URL Inspection Tool.

Previously, once a domain name was registered, the search engines would start crawling the websites, looking for new pages. This has changed drastically in the past few years, making it now necessary to “force” Google to crawl and index pages. For example, I now recommend using the URL Inspection Tool to ask Google to crawl ad new page or re-crawl a web page that has been updated.

During the testing phase, and when the testing was complete, we discovered many different issues that are worth noting. For example, here are some of the highlights of the results:

When it comes to checking pages indexed, my professional opinion is that one particular method is the most reliable and “most fair” and unbiased method. While the other methods are typically used in the search engine optimization industry by many professionals, I am now questioning the data, as all sources show different data at the end of the day.

Even though Google does say that there are a certain number of pages indexed, if we rely specifically on Google Search Console data, we had clear winners when it comes to pages indexed. The .XYZ, .CLUB, .ONLINE, and .CO.UK TLDs performed the best and had more pages indexed. We have a clear loser, though: The .ORG site has only 17 pages indexed.

When it comes to search engine rankings,at the conclusion of the test, 10 of the sites ended up having pages rank for their keyword in 55 positions in the top 100 search engine results. One could be considered a “loser” since it had its keyword rank in no positions in the top 100. This could potentially be a bias with the TLD, as the SEO software checked and not But, other ccTLDs tested, including the .DE and the .IN did have 55 positions in the top 100 search results. The others that didn’t do well were .ICU, .TOP, .SITE, and .VIP.

This is only a highlight of the data that was analyzed during the testing. I looked at a lot more data, such as impressions, clicks, average position, and more.

Are you interested in seeing the full results of our SEO Test of the TLD (Top Level Domains)? In the full 28 page report, we reveal all of the domain names, and show the progress throughout the full test.

Download the full report.

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