Domain authority
ctan.org domain authority
ctan.org has a domain authority score of 57 out of 100 (moderate), based on 2,793 referring domains and a web graph rank of 15,559 among 133 million domains; its traffic rank is Top 1M websites (Chrome).
All metrics for ctan.org
| Authority score | 57 / 100 |
|---|---|
| Referring domains | 2,793 |
| Web graph rank (harmonic centrality) | #15,559 (top 0.02%) |
| PageRank position | #14,365 |
| Subdomains seen in the crawl | 20 |
| Majestic Million rank | #2,872 |
| Majestic referring subnets / IPs | 7,731 / 11,037 |
| Traffic rank | Top 1M websites (Chrome) |
| Position by authority in our top 20,000 | #13,674 |
Top referring domains of ctan.org
These are the 10 best-connected websites that link to ctan.org in the Common Crawl domain-level web graph (release cc-main-2026-jul-aug-sep, updated quarterly). ctan.org has 2,793 referring domains in total; 1,673 of them are among the 5,000,000 best-connected domains of the graph, which are the ones we can list and rank here.
| # | Referring domain | Authority | Traffic rank |
|---|---|---|---|
| 1 | google.com | 98 | Top 1K (Chrome) |
| 2 | wikipedia.org | 91 | Top 1K (Chrome) |
| 3 | microsoft.com | 89 | Top 1K (Chrome) |
| 4 | github.com | 87 | Top 1K (Chrome) |
| 5 | mozilla.org | 86 | Top 50K (Chrome) |
| 6 | amazonaws.com | 87 | Top 50K (Chrome) |
| 7 | blogspot.com | 86 | Top 50K (Chrome) |
| 8 | github.io | 84 | Top 50K (Chrome) |
| 9 | w3.org | 82 | Top 100K (Chrome) |
| 10 | nih.gov | 85 | Top 5K (Chrome) |
Domain-level data: each row is a whole domain that links to ctan.org at least once somewhere on its site, not a single backlink or page, and no anchor text or link type is included. Common Crawl samples the public web, so a link can be missing and commercial backlink tools will show more.
Traffic rank of ctan.org
ctan.org is in Chrome's global Top 1M websites (August 2026), and is listed in 10 countries. Six-month trend: stable: in the same bucket as 6 months ago. In the global top 1M in 12 of the last 12 months.
Top countries
| Country | Chrome rank in that country |
|---|---|
| Morocco | Top 50K |
| United States | Top 500K |
| Brazil | Top 500K |
| Germany | Top 500K |
| India | Top 500K |
| Japan | Top 500K |
| United Kingdom | Top 500K |
| France | Top 500K |
Last 12 months (global)
| 2025-09 | 2025-10 | 2025-11 | 2025-12 | 2026-01 | 2026-02 | 2026-03 | 2026-04 | 2026-05 | 2026-06 | 2026-07 | 2026-08 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Top 1M | Top 1M | Top 1M | Top 1M | Top 1M | Top 1M | Top 1M | Top 1M | Top 1M | Top 1M | Top 1M | Top 1M |
Source: Chrome UX Report (Google, CC BY 4.0), the monthly popularity lists of origins by real Chrome page loads. A rank is a bucket, not an exact position: "Top 10K" means among the 10,000 most visited origins. It measures reach in Chrome, not visits, so it is not Similarweb traffic. Rank lists by country: Traffic rank by country.
How the authority score is calculated
The score is the average of two parts, each from 0 to 100:
- Rank part:
100 × (1 − log10(rank) / log10(N))^0.6, where rank is the domain's harmonic centrality position in the Common Crawl web graph (how close it is to every other domain through links) and N is the number of ranked domains (133,241,980). - Link part:
100 × log10(1 + referring domains) / 7, so 10 million referring domains = 100.
For this domain: rank part 64.7 (web graph rank 15,559 of 133,241,980), link part 49.2 (2,793 referring domains), average 57.0, rounded to 57.
It is consistent across all 120 million domains in the data, so it is good for ranking and filtering lists. It is not Moz Domain Authority or Ahrefs Domain Rating. Referring domains count other domains that link to this one, not individual backlinks; no list of linking pages is included.
Domains with a similar authority score
| # | Domain | Authority | Referring domains | Web graph rank | Traffic rank |
|---|---|---|---|---|---|
| 13,670 | parkinsons.org.uk | 57 | 2,795 | 14,692 | Top 500K websites (Chrome) |
| 13,671 | getsatisfaction.com | 57 | 2,794 | 12,447 | not in Chrome's top 1M |
| 13,672 | travelodge.co.uk | 57 | 2,794 | 18,933 | Top 50K websites (Chrome) |
| 13,673 | uncf.org | 57 | 2,793 | 15,138 | Top 500K websites (Chrome) |
| 13,675 | trmlabs.com | 57 | 2,790 | 13,322 | Top 1M websites (Chrome) |
| 13,676 | boost.org | 57 | 2,790 | 13,965 | Top 1M websites (Chrome) |
| 13,677 | learningforjustice.org | 57 | 2,788 | 13,589 | not in Chrome's top 1M |
| 13,678 | seafoodwatch.org | 57 | 2,787 | 14,207 | not in Chrome's top 1M |
Tech stack
ctan.org is built with Apache HTTP Server (detected from the public home page).
AI crawler policy
AI crawler policy: Open. GPTBot is allowed, ClaudeBot is allowed and PerplexityBot is allowed in its robots.txt (checked 2026-10-02). Does ctan.org block GPTBot? →
Compare and browse
FAQ
- What is the domain authority of ctan.org?
- ctan.org has a domain authority score of 57 out of 100 (moderate), based on 2,793 referring domains and a web graph rank of 15,559 among 133 million domains; its traffic rank is Top 1M websites (Chrome). The score is our own open-data metric (0-100) and is not Moz Domain Authority or Ahrefs Domain Rating.
- How many backlinks does ctan.org have?
- ctan.org is linked to from 2,793 other domains in the Common Crawl web graph (release cc-main-2026-jul-aug-sep). This counts referring domains, not individual backlinks, and Common Crawl does not see the whole web, so commercial tools that crawl more will show larger numbers.
- How does ctan.org rank among all websites?
- Its web graph rank (harmonic centrality) is 15,559 out of 133,241,980 ranked domains, which puts it in the top 0.02%. Its PageRank position is 14,365. Majestic Million ranks it #2,872.
- Is the ctan.org authority score the same as Moz DA or Ahrefs DR?
- No. It is an independent score computed from open data (Common Crawl, Majestic Million, Chrome UX Report). It is consistent across all domains, so it works for comparing and filtering sites, but the numbers will not match the commercial tools.
- Which websites link to ctan.org?
- The best-connected referring domains of ctan.org in the Common Crawl web graph (release cc-main-2026-jul-aug-sep) are google.com, wikipedia.org, microsoft.com, github.com and mozilla.org. This is a domain-level list from a quarterly crawl, so it names whole domains that link to ctan.org, not individual backlinks, and it is not complete.
- What is the traffic rank of ctan.org?
- ctan.org is in Chrome's global Top 1M websites in August 2026 (Chrome UX Report, a rank bucket rather than an exact position).