Domain authority
github.io domain authority
github.io has a domain authority score of 84 out of 100 (very high), based on 458,752 referring domains and a web graph rank of 45 among 133 million domains; its traffic rank is Top 50K websites (Chrome).
84 / 100
458,752
referring domains (backlinks from other domains)
#45
web graph rank of 133,241,980 domains
Top 50K
Chrome real-user traffic bucket
All metrics for github.io
| Authority score | 84 / 100 |
|---|---|
| Referring domains | 458,752 |
| Web graph rank (harmonic centrality) | #45 (top 0.01%) |
| PageRank position | #78 |
| Subdomains seen in the crawl | 317,964 |
| Majestic Million rank | #45 |
| Majestic referring subnets / IPs | 117,548 / 258,196 |
| Traffic rank | Top 50K websites (Chrome) |
| Position by authority in our top 20,000 | #63 |
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 87.2 (web graph rank 45 of 133,241,980), link part 80.9 (458,752 referring domains), average 84.1, rounded to 84.
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 |
|---|---|---|---|---|---|
| 59 | unsplash.com | 84 | 551,027 | 66 | Top 10K websites (Chrome) |
| 60 | fbcdn.net | 84 | 515,288 | 68 | not in Chrome's top 1M |
| 61 | soundcloud.com | 84 | 470,682 | 61 | Top 5K websites (Chrome) |
| 62 | nytimes.com | 84 | 460,992 | 62 | Top 1K websites (Chrome) |
| 64 | forbes.com | 84 | 436,043 | 52 | Top 5K websites (Chrome) |
| 65 | medium.com | 84 | 430,728 | 47 | Top 5K websites (Chrome) |
| 66 | ytimg.com | 83 | 543,357 | 140 | not in Chrome's top 1M |
| 67 | weebly.com | 83 | 456,397 | 89 | Top 100K websites (Chrome) |
Compare and browse
FAQ
- What is the domain authority of github.io?
- github.io has a domain authority score of 84 out of 100 (very high), based on 458,752 referring domains and a web graph rank of 45 among 133 million domains; its traffic rank is Top 50K 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 github.io have?
- github.io is linked to from 458,752 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 github.io rank among all websites?
- Its web graph rank (harmonic centrality) is 45 out of 133,241,980 ranked domains, which puts it in the top 0.01%. Its PageRank position is 78. Majestic Million ranks it #45.
- Is the github.io 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.