indexo.dev

ondrejsevcik.com

.com crawl

First seen 2026-04-11 · Last seen 2026-05-19 · ok HTTP/1.1 200 520 ms crawled 2026-05-19

US · 64.29.17.1 · AS16509 Amazon.com, Inc.

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
Ondrej Sevcik
Description
Frontend developer writing about JavaScript, React, CSS, web development, and software engineering best practices
Language
en
Feeds

Technology

CDN
Vercel

Social

Contact

Email

Registration

Registrar
Name.com, Inc.
Created
2015-11-22
Expires
2026-11-22 185 days left
Updated
2026-04-24
Name servers
  • ns1.vercel-dns.com
  • ns2.vercel-dns.com

DNS records live

NS
  • ns1.vercel-dns.com
  • ns2.vercel-dns.com
MX
  • 10 in1-smtp.messagingengine.com
  • 20 in2-smtp.messagingengine.com

Email authentication weak

SPF
v=spf1 include:spf.messagingengine.com ?all
neutral (?all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-04-30 to 2026-07-29
Expires in 69 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://ondrejsevcik.com/

present
  • strict-transport-security
findings
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
strict-transport-security
max-age=63072000

Links to (4)

Linked from (1)