What are referring domains?
A referring domain is a unique website that links to you — counted once, no matter how many pages on it link. It is a better measure of trust than raw backlink count, and the data proves it.
Updated 5 August 2026
Referring domains vs backlinks
The two are easy to confuse. A backlink is a single link. A referring domain is a unique website that links to you, counted once even if it links a thousand times. If a news site mentions you across 200 articles, that is 200 backlinks but a single referring domain.
Referring domains are the more meaningful number because they count independent sources of trust. Fifty links from one site is one endorsement repeated; fifty links from fifty sites is fifty separate votes.
Why the count alone can mislead you
Here is a finding from our analysis of 118 million domains that surprises most people. Sites with an authority score of 20–29 have a median of 22 referring domains. Sites a full band higher — 30–39 — have a median of only 15.
A stronger group of sites with fewer links. The reason: authority depends on where your links come from, not just how many. A few links from central, trusted domains outweigh many links from the periphery. Chasing referring-domain count as a KPI can send you collecting weak links that never move the needle. Read the full breakdown in our domain authority study.
What to measure instead
Look at the authority of the domains referring to you, not just the count. Five links from sites that are themselves well-connected will do more than fifty from thin directories. Our backlink checker sorts your referring domains by strength so you can see which ones actually carry weight.
Finding new referring domains
The highest-hit-rate way to earn new referring domains is to target sites that already link to your competitors — they have proven they link out in your niche. Our free link intersect tool finds exactly those sites.
See your referring domains — free
Frequently asked questions
Referring domains vs backlinks — what's the difference?
Backlinks count every individual link. Referring domains count the unique websites behind them. If one site links to you from 200 pages, that's 200 backlinks but only one referring domain. Referring domains are the more honest measure of how many independent sources trust you.
How many referring domains is good?
The median linked site has just two. Twenty referring domains already puts you ahead of about 97% of the web. To reach an authority score of 40 takes a median of around 650; to reach 60, around 12,800. Context matters more than any single target.
Does more referring domains always mean higher authority?
No — and we have the data to show it. Sites scoring 20–29 have a median of 22 referring domains, while stronger sites scoring 30–39 have a median of only 15. A few well-placed links from central sites beat many weak ones.