Domain authority
fsf.org domain authority
fsf.org has a domain authority score of 63 out of 100 (above average for a business website), based on 9,080 referring domains and a web graph rank of 4,103 among 133 million domains; its traffic rank is Top 1M websites (Chrome).
All metrics for fsf.org
| Authority score | 63 / 100 |
|---|---|
| Referring domains | 9,080 |
| Web graph rank (harmonic centrality) | #4,103 (top 0.01%) |
| PageRank position | #3,398 |
| Subdomains seen in the crawl | 72 |
| Majestic Million rank | #1,651 |
| Majestic referring subnets / IPs | 10,989 / 16,345 |
| Traffic rank | Top 1M websites (Chrome) |
| Position by authority in our top 20,000 | #4,171 |
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 70.3 (web graph rank 4,103 of 133,241,980), link part 56.5 (9,080 referring domains), average 63.4, rounded to 63.
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 |
|---|---|---|---|---|---|
| 4,167 | globalresearch.ca | 63 | 9,104 | 6,139 | Top 1M websites (Chrome) |
| 4,168 | mk.co.kr | 63 | 9,097 | 5,784 | Top 10K websites (Chrome) |
| 4,169 | thetrainline.com | 63 | 9,088 | 5,812 | Top 5K websites (Chrome) |
| 4,170 | universityofcalifornia.edu | 63 | 9,087 | 6,147 | Top 50K websites (Chrome) |
| 4,172 | prlog.org | 63 | 9,075 | 5,203 | Top 500K websites (Chrome) |
| 4,173 | bom.gov.au | 63 | 9,075 | 6,291 | Top 10K websites (Chrome) |
| 4,174 | undocs.org | 63 | 9,074 | 4,035 | not in Chrome's top 1M |
| 4,175 | ashrae.org | 63 | 9,070 | 4,230 | Top 500K websites (Chrome) |
Tech stack
fsf.org is built with Matomo and Nginx (detected from the public home page). Full tech stack of fsf.org →
AI crawler policy
We could not read the robots.txt of fsf.org on 2026-10-02, so its AI crawler rules are unknown. Does fsf.org block GPTBot? →
Compare and browse
FAQ
- What is the domain authority of fsf.org?
- fsf.org has a domain authority score of 63 out of 100 (above average for a business website), based on 9,080 referring domains and a web graph rank of 4,103 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 fsf.org have?
- fsf.org is linked to from 9,080 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 fsf.org rank among all websites?
- Its web graph rank (harmonic centrality) is 4,103 out of 133,241,980 ranked domains, which puts it in the top 0.01%. Its PageRank position is 3,398. Majestic Million ranks it #1,651.
- Is the fsf.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.