Domain authority
rarediseaseday.org domain authority
rarediseaseday.org has a domain authority score of 55 out of 100 (moderate), based on 2,150 referring domains and a web graph rank of 24,425 among 133 million domains.
55 / 100
2,150
referring domains (backlinks from other domains)
#24,425
web graph rank of 133,241,980 domains
–
not in Chrome's top 1M
All metrics for rarediseaseday.org
| Authority score | 55 / 100 |
|---|---|
| Referring domains | 2,150 |
| Web graph rank (harmonic centrality) | #24,425 (top 0.02%) |
| PageRank position | #52,351 |
| Subdomains seen in the crawl | 8 |
| Majestic Million rank | #37,734 |
| Majestic referring subnets / IPs | 1,563 / 2,159 |
| Traffic rank | not in Chrome's top 1M |
| Position by authority in our top 20,000 | #18,494 |
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 62.8 (web graph rank 24,425 of 133,241,980), link part 47.6 (2,150 referring domains), average 55.2, 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 |
|---|---|---|---|---|---|
| 18,490 | uca.edu | 55 | 2,152 | 28,656 | Top 100K websites (Chrome) |
| 18,491 | clinique.com | 55 | 2,152 | 32,078 | Top 100K websites (Chrome) |
| 18,492 | asterisk.org | 55 | 2,151 | 21,476 | not in Chrome's top 1M |
| 18,493 | unilim.fr | 55 | 2,151 | 26,762 | Top 500K websites (Chrome) |
| 18,495 | kltv.com | 55 | 2,150 | 26,445 | Top 500K websites (Chrome) |
| 18,496 | eadt.co.uk | 55 | 2,150 | 27,529 | Top 50K websites (Chrome) |
| 18,497 | readingeagle.com | 55 | 2,149 | 21,952 | Top 500K websites (Chrome) |
| 18,498 | humber.ca | 55 | 2,149 | 23,411 | Top 500K websites (Chrome) |
Compare and browse
FAQ
- What is the domain authority of rarediseaseday.org?
- rarediseaseday.org has a domain authority score of 55 out of 100 (moderate), based on 2,150 referring domains and a web graph rank of 24,425 among 133 million domains. The score is our own open-data metric (0-100) and is not Moz Domain Authority or Ahrefs Domain Rating.
- How many backlinks does rarediseaseday.org have?
- rarediseaseday.org is linked to from 2,150 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 rarediseaseday.org rank among all websites?
- Its web graph rank (harmonic centrality) is 24,425 out of 133,241,980 ranked domains, which puts it in the top 0.02%. Its PageRank position is 52,351. Majestic Million ranks it #37,734.
- Is the rarediseaseday.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.