Domain authority
co.com domain authority
co.com has a domain authority score of 73 out of 100 (high), based on 56,449 referring domains and a web graph rank of 568 among 133 million domains; its traffic rank is Top 50K websites (Chrome).
All metrics for co.com
| Authority score | 73 / 100 |
|---|---|
| Referring domains | 56,449 |
| Web graph rank (harmonic centrality) | #568 (top 0.01%) |
| PageRank position | #1,464 |
| Subdomains seen in the crawl | 7,257 |
| Majestic Million rank | #562 |
| Majestic referring subnets / IPs | 22,185 / 70,281 |
| Traffic rank | Top 50K websites (Chrome) |
| Position by authority in our top 20,000 | #478 |
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 78.0 (web graph rank 568 of 133,241,980), link part 67.9 (56,449 referring domains), average 72.9, rounded to 73.
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 |
|---|---|---|---|---|---|
| 474 | nikkei.com | 73 | 61,516 | 698 | Top 1K websites (Chrome) |
| 475 | ctfassets.net | 73 | 60,098 | 693 | not in Chrome's top 1M |
| 476 | akamaihd.net | 73 | 58,469 | 462 | Top 500K websites (Chrome) |
| 477 | techtarget.com | 73 | 58,430 | 691 | Top 500K websites (Chrome) |
| 479 | postimg.cc | 73 | 56,181 | 438 | Top 50K websites (Chrome) |
| 480 | trello.com | 73 | 55,959 | 493 | Top 5K websites (Chrome) |
| 481 | anthropic.com | 73 | 55,398 | 585 | Top 50K websites (Chrome) |
| 482 | heart.org | 73 | 54,617 | 629 | Top 50K websites (Chrome) |
Tech stack
co.com is built with Apache HTTP Server (detected from the public home page).
AI crawler policy
AI crawler policy: Blocks all AI search. GPTBot is blocked, ClaudeBot is blocked and PerplexityBot is blocked in its robots.txt (checked 2026-10-02). Does co.com block GPTBot? →
Compare and browse
FAQ
- What is the domain authority of co.com?
- co.com has a domain authority score of 73 out of 100 (high), based on 56,449 referring domains and a web graph rank of 568 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 co.com have?
- co.com is linked to from 56,449 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 co.com rank among all websites?
- Its web graph rank (harmonic centrality) is 568 out of 133,241,980 ranked domains, which puts it in the top 0.01%. Its PageRank position is 1,464. Majestic Million ranks it #562.
- Is the co.com 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.