321seo.cz

.cz crawl

First seen 2026-05-22 · Last seen 2026-05-30 · ok HTTP/1.1 200 3797 ms crawled 2026-05-28

US · 104.21.64.123 · AS13335 Cloudflare, Inc.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title: 321 SEO Agentura digitálního marketingu
Description: On-line marketing pro zvýšení návštěvnosti webu, zvýšení prodejnosti a počtu poptávek, prodejnosti.
Language: cs

Open Graph

url: https://www.321seo.cz/
title: 321 SEO Agentura digitálního marketingu
site name: 321 SEO Agentura digitálního marketingu
description: On-line marketing pro zvýšení návštěvnosti webu, zvýšení prodejnosti a počtu poptávek, prodejnosti.

Technology

CDN: Cloudflare
Stack: PHP

Analytics

Google Tag Manager

Fonts

Google Fonts

Third-party hosts loaded (5)

cdnjs.cloudflare.com×7
fonts.googleapis.com×4
www.googletagmanager.com×3
fonts.gstatic.com×2
cdn.jsdelivr.net×1

Social

Contact

Phone

+420739913656

Registration

Registrar

REG-GRANSY

Created

2022-06-29

Expires

2026-06-28 27 days left

Updated

2024-06-07

Name servers

lola.ns.cloudflare.com
tony.ns.cloudflare.com

DNS records live

NS

lola.ns.cloudflare.com
tony.ns.cloudflare.com

MX

0 mx5.onebit.cz
10 mx5.onebit.eu

Email authentication weak

SPF: not published
DMARC: v=DMARC1; p=none;
policy: none (monitoring only)
DKIM: no key found at common selectors

Certificate (current)

WE1

from 2026-05-09 to 2026-08-07

Expires in 68 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://www.321seo.cz/

present

strict-transport-security
x-frame-options
x-content-type-options
referrer-policy

findings

missing Content Security Policy
missing Permissions Policy

Header values

referrer-policy: same-origin
x-frame-options: SAMEORIGIN
x-content-type-options: nosniff
strict-transport-security: max-age=63072000; includeSubDomains