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Domain report

postgresql.com

postgresql.com ranks in the top 0.32% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 3 distinct hosts observed under it.

Explore postgresql.com in the Web Graph

Connectivity

#420,509harmonic-centrality rank
Top percentile
0.32%
Hosts observed
3

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://postgresql.com/ answered with HTTP 200.

DNS records

A
  • 217.196.149.50
AAAA
  • 2a02:16a8:dc51::50
MX
No records found.
NS
  • ns1.postgresql.org.
  • ns2.postgresql.org.
  • ns3.postgresql.org.
  • ns4.postgresql.org.

Live preview

Screenshot of postgresql.com

This site sends "X-Frame-Options: DENY", which blocks embedding it here.

Since postgresql.com can't be embedded live, this is a captured screenshot instead — a snapshot from whenever it was last rendered, not necessarily this exact moment.

Domain registration (WHOIS / RDAP)

RDAP lookup failed (HTTP 429).

How to read WHOIS and RDAP data

SSL certificate

Certificate Transparency lookup failed (HTTP 429).

How to check when a certificate expires

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
default-src 'self' ; img-src * data: ; script-src 'unsafe-eval' 'self' www.google-analytics.com ssl.google-analytics.com www.googletagmanager.com tagmanager.google.com data: ; connect-src 'self' www.google-analytics.com ssl.google-analytics.com ; media-src 'self' ; style-src 'self' fonts.googleapis.com tagmanager.google.com ; font-src 'self' fonts.gstatic.com data: ; frame-ancestors 'none' ; report-uri https://csp-report.postgresql.org/
Strict-Transport-Security
max-age=31536000
X-Frame-Options
DENY
X-Content-Type-Options
Not sent
Referrer-Policy
Not sent
Permissions-Policy
Not sent

What each security header does

Redirect chain

  1. 1.http://postgresql.com/HTTP 301

    → https://www.postgresql.org/

  2. 2.https://www.postgresql.org/HTTP 200

Meta tags

Title
PostgreSQL: The world's most advanced open source database
Description
The official site for PostgreSQL, the world's most advanced open source database
Canonical
Not set
Robots
Not set
Generator
Not set
Open Graph title
PostgreSQL
Open Graph description
The world's most advanced open source database.
Open Graph image
https://www.postgresql.org/media/img/about/press/elephant.png
Open Graph type
article
Twitter card
Not set
Twitter title
Not set
Twitter image
Not set

robots.txt

Disallow rules (User-agent: *)
9
Disallow rules (other agents)
0

Sitemap declared:

  • https://www.postgresql.org/sitemap.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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