Domain authority
art21.org domain authority
art21.org has a domain authority score of 55 out of 100 (moderate), based on 1,918 referring domains and a web graph rank of 18,184 among 133 million domains; its traffic rank is Top 1M websites (Chrome).
55 / 100
1,918
referring domains (backlinks from other domains)
#18,184
web graph rank of 133,241,980 domains
Top 1M
Chrome real-user traffic bucket
All metrics for art21.org
| Authority score | 55 / 100 |
|---|---|
| Referring domains | 1,918 |
| Web graph rank (harmonic centrality) | #18,184 (top 0.02%) |
| PageRank position | #73,053 |
| Subdomains seen in the crawl | 14 |
| Majestic Million rank | #41,556 |
| Majestic referring subnets / IPs | 1,475 / 2,245 |
| Traffic rank | Top 1M websites (Chrome) |
| Position by authority in our top 20,000 | #18,905 |
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 64.0 (web graph rank 18,184 of 133,241,980), link part 46.9 (1,918 referring domains), average 55.5, rounded to 55.
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 |
|---|---|---|---|---|---|
| 18,901 | nhi.gov.tw | 55 | 1,920 | 23,871 | Top 50K websites (Chrome) |
| 18,902 | ustreas.gov | 55 | 1,920 | 26,728 | not in Chrome's top 1M |
| 18,903 | angel.com | 55 | 1,919 | 19,735 | Top 50K websites (Chrome) |
| 18,904 | silicon.fr | 55 | 1,919 | 28,127 | not in Chrome's top 1M |
| 18,906 | univalle.edu.co | 55 | 1,918 | 25,120 | Top 500K websites (Chrome) |
| 18,907 | clark.com | 55 | 1,917 | 23,235 | Top 500K websites (Chrome) |
| 18,908 | www.gov.sg | 55 | 1,916 | 19,863 | Top 1M websites (Chrome) |
| 18,909 | bitinfocharts.com | 55 | 1,916 | 21,693 | Top 500K websites (Chrome) |
Compare and browse
FAQ
- What is the domain authority of art21.org?
- art21.org has a domain authority score of 55 out of 100 (moderate), based on 1,918 referring domains and a web graph rank of 18,184 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 art21.org have?
- art21.org is linked to from 1,918 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 art21.org rank among all websites?
- Its web graph rank (harmonic centrality) is 18,184 out of 133,241,980 ranked domains, which puts it in the top 0.02%. Its PageRank position is 73,053. Majestic Million ranks it #41,556.
- Is the art21.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.