What is a referring domain?

A referring domain is a unique website that links to your site at least once. Whether that site links to you once or fifty times, it counts as one referring domain, while every single link counts as a separate backlink. Our own site, for example, has 377 referring domains and roughly 3,100 backlinks in Ahrefs.

What is SEO worth to you? Calculate the pipeline from your organic traffic with the free SEO ROI calculator.

What is a referring domain exactly?

A referring domain is every separate website (every separate domain) from which at least one backlink points to you. If you get three links from a trade magazine and two from a partner site, you have five backlinks but only two referring domains.

The distinction seems small, but it says something fundamentally different. Backlinks count the number of votes; referring domains count the number of different voters. Ahrefs puts it in one line in its help article on referring domains versus backlinks: referring domains are the domains from which a site has one or more backlinks.

For SEO, that difference matters. A hundred links from a single website say less about your credibility than ten links from ten different, relevant websites. Broad trust carries more weight than repeated trust from the same corner.

What is the difference between a referring domain and a backlink?

The practical lesson: do not blindly look at a large number of backlinks. A profile with a thousand links from twenty domains is usually weaker than a profile with two hundred links from a hundred relevant domains. If you also want to know why a referring page is something different again from a referring domain, read what a referring page is.

Why do referring domains carry more weight than backlinks?

Google wants to know whether your content is broadly trusted, not whether a single friendly site happens to give you a lot of links. Every new, relevant domain that points to you adds an independent trust signal. A second, third or tenth link from that same domain adds far less to it.

That is why most SEO tools and analyses look at the number of unique referring domains as the core measure of a link profile’s strength. It is also the metric that moves along with scores such as domain authority: if a competitor wins many new referring domains, you often see that reflected in their authority and their rankings. Want to raise yours? Read how to increase domain authority.

Quality remains essential. Five referring domains from your sector, from sites that genuinely reach your audience, do more than fifty random domains with no connection. Quantity without relevance is not a goal, and some of it is a risk: Google’s spam policies name bought links, links from low-quality directories and links placed widely in site-wide footers or templates as link spam. A footer link on every site a web builder makes looks like many backlinks, but it is still one referring domain, and a weak one.

How do you check your referring domains?

You do not need a paid tool to start. These three steps give you a reliable picture in under half an hour.

Step 1: Open the Links report in Search Console

In Google Search Console, go to Links and open Top linking sites. That list is your referring domains as Google sees them, grouped by root domain. Google’s Links report help page notes that the report is a sample, not every link, and that the on-screen tables stop at 1,000 rows.

The Links report in our own Search Console. Scroll down to Top linking sites: every row there is one referring domain.

Step 2: Compare with a backlink tool

A backlink tool adds what Search Console does not: a count over time and metrics per domain. Ahrefs Free covers your own verified site. In our own Ahrefs account, customerimpact.be shows a Domain Rating of 26 with 377 referring domains.

Our own domain in Ahrefs Site Explorer: Domain Rating 26 and 377 referring domains.

Do not expect Search Console and Ahrefs to agree. Each crawls the web differently, so the counts differ. Pick one source for trend reporting and stick to it.

Step 3: Sort the list by relevance, not by size

Open the referring domains list and ask one question per domain: does this site reach the people who buy from us? Mark the relevant ones, ignore the noise, and only look at toxic backlinks if you see clear spam patterns.

The referring domains report in our own Ahrefs account. Sorting by relevance to your buyers says more than sorting by DR.

How do you build more relevant referring domains?

You earn more unique referring domains the same way you earn strong backlinks: by being or making something others are happy to refer to. Think of your own research, useful guides, a handy tool or expertise you share on industry platforms. Every new site that links to you because of it is an extra referring domain. You will find the concrete approach in link building, and a realistic target in how many backlinks you need to rank.

How we approach it: we do not start with links. We first restructure the site (internal linking, titles, and putting your own data, way of working and use cases on the pages), and only then earn contextual links from partners and companies in the same ecosystem, plus digital PR. We do not buy links from networks of old domains that exist only to pass signals.

An honest caveat for B2B: do not chase the number. For a small B2B company, a handful of strong, relevant domains per year often delivers more than a long list of weak mentions. And a growing number of referring domains means nothing if your site does not convert those extra visitors into enquiries. That is why we steer on customers and revenue, with referring domains as a compass, not as a scoreboard.

Want to know how strong your link profile is?

We map your referring domains, compare them with those of your competitors and build relevant, lasting links in a safe way. No bought packages, but earned domains that strengthen your authority and your pipeline.

We are a small team that moves fast and tells you honestly when an investment is not worth it. Take a look at our approach to SEO or let us have a look with you.

Contact us

Frequently asked questions about referring domains

What is the difference between a referring domain and a backlink?

A backlink is every individual link to your site. A referring domain is a unique website that provides at least one backlink. Ten links from the same site are ten backlinks, but only one referring domain.

What is more important: more backlinks or more referring domains?

Usually more unique referring domains. Broad trust from many different relevant sites carries more weight than many links from the same corner. The quality and relevance of the domains count most of all.

How many referring domains do I need?

There is no fixed number. It depends on your sector and your competitors. The better question is how your number of relevant referring domains compares to that of the sites ranking above you.

Do multiple links from the same domain not count?

They do count as extra backlinks, but they add little to your number of referring domains and to your trust signal. The biggest gain lies in a new, relevant domain that links to you for the first time.

How do I check my referring domains for free?

Open Links in Google Search Console and look at Top linking sites: each row is one referring domain. For trends and metrics per domain, add Ahrefs Free for your own verified site.