Enter a domain to get its Revised Authority score: a 0 to 100 measure of link-based standing, computed from the open Common Crawl web graph.
Domain Authority is Moz’s proprietary score. We don’t licence it, resell it, or estimate it. Only Moz can tell you a domain’s DA. What this checker gives you instead is Revised Authority, our own 0 to 100 score, computed from the open Common Crawl web graph, with the ranks behind it shown next to the number so you can see exactly what was measured.
Common Crawl publishes a hyperlink graph covering more than a hundred million domains, and with it a harmonic centrality rank and a PageRank rank for each one. Revised Authority maps those two positions onto a 0 to 100 scale, weighted towards centrality. It answers the question a domain authority check is usually asked, how much of the web points at this domain and whether any of it matters, from data anyone can download and check.
It is free, there is no signup, and there is no usage cap. Every result names the crawl release it came from, so a score you share today reads the same tomorrow.
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One number, and every rank it was built from. Here is what each part of a result means.
A 0 to 100 score built from where a domain sits in the Common Crawl web graph: its harmonic centrality rank and its PageRank rank across every domain in one crawl. Higher means more of the web points at it, from places the rest of the web points at.
Domain Authority is Moz's own score, and it is theirs. We don't licence it, resell it, or estimate it. This page gives you our number and shows the ranks it came from, so you can see exactly what is being measured.
Harmonic centrality asks how close a domain is to the rest of the web. PageRank asks how much link value flows into it. We show both raw positions next to the score, because a rank out of a hundred million domains is a fact you can check and a score is an interpretation of it.
Referring domains and backlink counts come from a third-party link index, and they carry the date they were last refreshed. They sit next to the score rather than inside it, because the score is built from the open graph and nothing else.
One public input, a fixed formula, and the release it came from on every result.
Common Crawl publishes a hyperlink graph of the web with each crawl, and with it two ranks for every domain in the graph: a harmonic centrality rank and a PageRank rank. The May to July 2026 release covers 117,963,409 domains. We import those two ranks and nothing else. No vendor data, no proprietary signal, no manual adjustment.
Each rank is mapped onto 0 to 100 with a log-rank curve: 100 multiplied by one minus the log of the rank over the log of the number of domains in the release. Log rather than linear, because link graphs follow a power law and a linear percentile would put almost the whole web in one band at the bottom.
Revised Authority is 65 percent of the centrality score plus 35 percent of the PageRank score, rounded. Centrality carries the larger weight because on this graph PageRank pins a large share of domains to a floor value and stops separating them, while centrality keeps them spread out. PageRank still earns its share: it is the measure that rewards being linked from places that are themselves linked.
Domain Authority is Moz's score, built from Moz's own link index with a model trained to predict rankings. Only Moz can tell you a domain's DA. Revised Authority answers a similar question from a public graph with a published formula. The two use different scales and will not match, and neither is Google's. Google does not publish a domain-level authority score of any kind.
The score is a summary. The two ranks under it are the facts. A centrality rank of 250,000 out of 118 million puts a domain in the top quarter of a percent of the graph, and that is a claim you can check against Common Crawl's own published files. The tracked sources linking in are domains from our own slice of the graph that point at the result.
Backlink counts, when present, come from a separate link index with its own refresh date. They sit beside the score rather than inside it, because the score is built from the open graph and nothing else.
A domain that is not in the graph release has no rank to score from. That usually means the crawl recorded no inbound links to it, which is normal for a new, small or private site. It is an absence of signal, not a zero. Subdomains carry their own position. When the exact hostname misses and the registrable domain hits, the page shows the parent's score with a note saying so.
An expired domain keeps its graph position until the next release is imported and the links have changed, so a lapsed name can outscore a new one for a long time. Check the score, then run the backlink checker to see which domains produce it, and the expired domain checker to see whether the name has actually lapsed and what it used to be. Every listing in the directory shows its standing from the same Common Crawl graph, so a score here reads against the same scale as one there.
A domain authority checker estimates how strong a website's link profile is, usually on a 0 to 100 scale, so you can compare one domain against another. This one scores a domain from its position in the Common Crawl web graph and shows you the underlying ranks rather than only the number.
Enter the domain above. No signup, no card, and no usage cap beyond a per-visitor rate limit. You get the score, both graph ranks, the sources we found linking in, and any backlink counts we hold.
No. Domain Authority is Moz's proprietary score and only Moz can tell you a domain's DA. The number here is Revised Authority, computed by us from the open Common Crawl web graph. It measures a similar thing, link-based standing, but it is a different score on a different scale, and the two will not match.
Common Crawl publishes a harmonic centrality rank and a PageRank rank for every domain in its web graph. We map each onto a 0 to 100 scale with a log-rank curve, then weight centrality at 65 percent and PageRank at 35 percent. The release the ranks came from is shown with every result, and the score only moves when a new release is imported.
The crawl recorded no inbound links to it, which is normal for a new, small, or private site. It is not a score of zero. A zero would say we measured the domain and found nothing, and that is a different claim. Check again after the next crawl release.
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Every listing shows its link-graph standing from the same Common Crawl release, its referring domains and its archive history before the name is revealed.
