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Domain report

kulpinski.dev

kulpinski.dev ranks in the top 22.75% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 1 distinct host observed under it.

Explore kulpinski.dev in the Web Graph

Connectivity

#30,317,590harmonic-centrality rank
Top percentile
22.75%
Hosts observed
1

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://kulpinski.dev/ answered with HTTP 200.

Certificate until 2026-11-20C=US, O=Google Trust Services, CN=WE1

DNS records

A
  • 104.21.42.181
  • 172.67.207.123
AAAA
  • 2606:4700:3037::6815:2ab5
  • 2606:4700:3030::ac43:cf7b
MX
No records found.
NS
  • anuj.ns.cloudflare.com.
  • leanna.ns.cloudflare.com.
AS
Server in network CLOUDFLARENET, AS13335 · United States104.21.42.0/24, which holds 104.21.42.181

Live preview

This is a live, sandboxed embed of kulpinski.dev — not a copy. What it shows can change any time the site itself does.

Domain registration (WHOIS / RDAP)

Registrar
CloudFlare, Inc.
Registered
2024-03-18
Expires
2027-03-18
Last changed
2026-02-21

Nameservers: anuj.ns.cloudflare.com, leanna.ns.cloudflare.com

Status: client transfer prohibited

How to read WHOIS and RDAP data

SSL certificate

Common name
kulpinski.dev
Issuer
C=US, O=Google Trust Services, CN=WE1
Valid from
2026-08-22
Valid until
2026-11-20

Matches kulpinski.dev exactly. Source: Certificate Transparency logs (crt.sh).

How to check when a certificate expires

HTTP & security headers

Response

Server
cloudflare
Content-Type
text/html; charset=utf-8
Cache-Control
public, max-age=0, must-revalidate
Content-Encoding
Not sent

Security

Content-Security-Policy
Not sent
Strict-Transport-Security
Not sent
X-Frame-Options
Not sent
X-Content-Type-Options
nosniff
Referrer-Policy
strict-origin-when-cross-origin
Permissions-Policy
Not sent

What each security header does

Redirect chain

  1. 1.http://kulpinski.dev/HTTP 301

    → https://kulpinski.dev/

  2. 2.https://kulpinski.dev/HTTP 200

Meta tags

Title
Piotr Kulpinski's Blog
Description
I work as an independent software engineer and designer. I'm passionate about creating beautiful, accessible, and performant web. I write about things I learn and find interesting.
Canonical
https://kulpinski.dev/
Robots
index, follow
Generator
Astro v5.18.1
Open Graph title
Piotr Kulpinski's Blog
Open Graph description
Not set
Open Graph image
https://kulpinski.dev/opengraph.png
Open Graph type
website
Twitter card
summary_large_image
Twitter title
Not set
Twitter image
Not set

robots.txt

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

Sitemap declared:

  • https://kulpinski.dev/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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