Domain authority
vaccines.gov domain authority
vaccines.gov has a domain authority score of 58 out of 100 (moderate), based on 3,941 referring domains and a web graph rank of 15,492 among 133 million domains.
58 / 100
3,941
referring domains (backlinks from other domains)
#15,492
web graph rank of 133,241,980 domains
–
not in Chrome's top 1M
All metrics for vaccines.gov
| Authority score | 58 / 100 |
|---|---|
| Referring domains | 3,941 |
| Web graph rank (harmonic centrality) | #15,492 (top 0.02%) |
| PageRank position | #20,790 |
| Subdomains seen in the crawl | 5 |
| Majestic Million rank | #17,761 |
| Majestic referring subnets / IPs | 2,460 / 4,285 |
| Traffic rank | not in Chrome's top 1M |
| Position by authority in our top 20,000 | #10,938 |
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 15,492 of 133,241,980), link part 51.4 (3,941 referring domains), average 58.0, rounded to 58.
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 |
|---|---|---|---|---|---|
| 10,934 | hospedagemdesites.ws | 58 | 3,950 | 16,335 | not in Chrome's top 1M |
| 10,935 | ujaen.es | 58 | 3,949 | 18,591 | Top 500K websites (Chrome) |
| 10,936 | ochaopt.org | 58 | 3,942 | 15,495 | not in Chrome's top 1M |
| 10,937 | sandiegocounty.gov | 58 | 3,941 | 13,214 | Top 500K websites (Chrome) |
| 10,939 | tayori.com | 58 | 3,941 | 18,202 | Top 500K websites (Chrome) |
| 10,940 | gijon.es | 58 | 3,939 | 13,813 | Top 500K websites (Chrome) |
| 10,941 | shadertoy.com | 58 | 3,938 | 16,233 | Top 500K websites (Chrome) |
| 10,942 | vtdigger.org | 58 | 3,937 | 13,013 | Top 500K websites (Chrome) |
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FAQ
- What is the domain authority of vaccines.gov?
- vaccines.gov has a domain authority score of 58 out of 100 (moderate), based on 3,941 referring domains and a web graph rank of 15,492 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 vaccines.gov have?
- vaccines.gov is linked to from 3,941 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 vaccines.gov rank among all websites?
- Its web graph rank (harmonic centrality) is 15,492 out of 133,241,980 ranked domains, which puts it in the top 0.02%. Its PageRank position is 20,790. Majestic Million ranks it #17,761.
- Is the vaccines.gov 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.