indexo.dev

janlavicka.com

.com crawl

First seen 2026-04-11 · Last seen 2026-05-19 · ok HTTP/1.1 200 2026 ms crawled 2026-05-19

US · 104.21.31.222 · AS13335 Cloudflare, Inc.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
Jan Lavička
Description
Jan Lavička's personal website. I'm a creator, full-stack software developer, and indie hacker.
Language
en

Open Graph

url
https://janlavicka.com
title
Jan Lavička
locale
en_US
site name
Jan Lavička
description
Jan Lavička's personal website. I'm a creator, full-stack software developer, and indie hacker.

Technology

CDN
Cloudflare
Analytics
  • Cloudflare Insights
  • Google Tag Manager

Third-party hosts loaded (3)

  • rsms.me×1
  • static.cloudflareinsights.com×1
  • www.googletagmanager.com×1

Social

Contact

Email

Registration

Registrar
NameCheap, Inc.
Created
2019-12-19
Expires
2026-12-19 212 days left
Updated
2025-12-12
Name servers
  • cleo.ns.cloudflare.com
  • stevie.ns.cloudflare.com

DNS records live

NS
  • cleo.ns.cloudflare.com
  • stevie.ns.cloudflare.com
MX
  • 10 670c211dcd0e178f.mx1.emailprofi.seznam.cz
  • 20 670c211dcd0e178f.mx2.emailprofi.seznam.cz
Verified for
  • Google
  • Yandex

Email authentication partial

SPF
v=spf1 include:spf.seznam.cz ~all
softfail (~all)
DMARC
v=DMARC1; p=none; rua=mailto:dmarc@janlavicka.com
policy: none (monitoring only)
DKIM
no key found at common selectors

Certificate (current)

WE1
from 2026-04-15 to 2026-07-14
Expires in 55 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://janlavicka.com/

present
  • content-security-policy
  • x-frame-options
  • x-content-type-options
  • referrer-policy
findings
  • missing HSTS
  • missing Permissions Policy
Header values
referrer-policy
same-origin
x-frame-options
SAMEORIGIN
x-content-type-options
nosniff
content-security-policy
frame-ancestors 'none'

Links to (5)

Linked from (1)