Domain report
string-db.org
string-db.org ranks in the top 0.014% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 26 distinct hosts observed under it.
Connectivity
#19,313harmonic-centrality rank
- Top percentile
- 0.014%
- Hosts observed
- 26
From the Common Crawl cc-main-2026-jul-aug-sep hyperlink graph, 133,241,980 domains total. What this rank means
HTTPS reachability
200HTTP status
https://string-db.org/ answered with HTTP 200.
DNS records
- A
- 104.20.30.87
- 172.66.159.216
- AAAA
- 2606:4700:10::ac42:9fd8
- 2606:4700:10::6814:1e57
- MX
- No records found.
- NS
- iris.ns.cloudflare.com.
- sean.ns.cloudflare.com.
Live preview
This is a live, sandboxed embed of string-db.org — not a copy. What it shows can change any time the site itself does.
Domain registration (WHOIS / RDAP)
RDAP lookup failed (HTTP 429).
SSL certificate
Certificate Transparency lookup failed (HTTP 429).
HTTP & security headers
Response
- Server
- cloudflare
- Content-Type
- text/html; charset=utf-8
- Cache-Control
- Not sent
- Content-Encoding
- Not sent
Security
- Content-Security-Policy
- Not sent
- Strict-Transport-Security
- Not sent
- X-Frame-Options
- Not sent
- X-Content-Type-Options
- Not sent
- Referrer-Policy
- Not sent
- Permissions-Policy
- Not sent
Redirect chain
- 1.
http://string-db.org/HTTP 301→ https://string-db.org/
- 2.
https://string-db.org/HTTP 200
Meta tags
- Title
- STRING: functional protein association networks
- Description
- STRING is a database of known and predicted protein-protein interactions and a functional enrichment tool.
- Canonical
- https://string-db.org
- Robots
- Not set
- Generator
- Not set
- Open Graph title
- Not set
- Open Graph description
- Not set
- Open Graph image
- Not set
- Open Graph type
- Not set
- Twitter card
- Not set
- Twitter title
- Not set
- Twitter image
- Not set
robots.txt
- Disallow rules (User-agent: *)
- 74
- Disallow rules (other agents)
- 0
Sitemap declared:
https://string-db.org/sitemap_index.xml
Technology detected
Best-effort, based on a small set of well-known signals — this may be incomplete.
- Cloudflarecdn
Server: cloudflare
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Similar connectivity
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