Domain authority
ffm.bio domain authority
ffm.bio has a domain authority score of 60 out of 100 (above average for a business website), based on 3,411 referring domains and a web graph rank of 5,417 among 133 million domains; its traffic rank is Top 500K websites (Chrome).
60 / 100
3,411
referring domains (backlinks from other domains)
#5,417
web graph rank of 133,241,980 domains
Top 500K
Chrome real-user traffic bucket
All metrics for ffm.bio
| Authority score | 60 / 100 |
|---|---|
| Referring domains | 3,411 |
| Web graph rank (harmonic centrality) | #5,417 (top 0.01%) |
| PageRank position | #5,437 |
| Subdomains seen in the crawl | 1 |
| Majestic Million rank | #20,014 |
| Majestic referring subnets / IPs | 2,287 / 4,398 |
| Traffic rank | Top 500K websites (Chrome) |
| Position by authority in our top 20,000 | #8,221 |
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 69.1 (web graph rank 5,417 of 133,241,980), link part 50.5 (3,411 referring domains), average 59.8, rounded to 60.
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 |
|---|---|---|---|---|---|
| 8,217 | lightreading.com | 60 | 3,431 | 4,994 | Top 500K websites (Chrome) |
| 8,218 | tripit.com | 60 | 3,429 | 4,932 | Top 500K websites (Chrome) |
| 8,219 | tsargrad.tv | 60 | 3,426 | 5,360 | Top 50K websites (Chrome) |
| 8,220 | itnews.com.au | 60 | 3,418 | 5,468 | Top 1M websites (Chrome) |
| 8,222 | pragprog.com | 60 | 3,403 | 5,317 | not in Chrome's top 1M |
| 8,223 | umsl.edu | 60 | 3,397 | 6,178 | Top 1M websites (Chrome) |
| 8,224 | diskunion.net | 60 | 3,382 | 4,611 | Top 50K websites (Chrome) |
| 8,225 | larksuite.com | 60 | 3,378 | 5,278 | Top 100K websites (Chrome) |
FAQ
- What is the domain authority of ffm.bio?
- ffm.bio has a domain authority score of 60 out of 100 (above average for a business website), based on 3,411 referring domains and a web graph rank of 5,417 among 133 million domains; its traffic rank is Top 500K 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 ffm.bio have?
- ffm.bio is linked to from 3,411 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 ffm.bio rank among all websites?
- Its web graph rank (harmonic centrality) is 5,417 out of 133,241,980 ranked domains, which puts it in the top 0.01%. Its PageRank position is 5,437. Majestic Million ranks it #20,014.
- Is the ffm.bio 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.