Skip to main content
SGSiteGraph

257.cz

257.cz - Domény, expirované domény

Last scanned Jul 23, 2026, 12:53 PM

75

Overall score

Fair

Summary

Expirované domény .cz. This website uses Nginx hosted on MASTER-AS - MasterDC s.r.o., CZ. SEO is fair (65/100) and accessibility is fair (60/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Missing canonical link.

Expirované domény .cz

CZ
Hosted on MASTER-AS - MasterDC s.r.o., CZ

Top issues to fix

12 issues found · 2 high priority

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • Over half of images are missing alt text

    Accessibility

    Add alt attributes to images — screen readers depend on them, and they help image SEO.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • Missing X-Frame-Options header

    Security

    Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

  • Missing canonical link

    SEO

    Add <link rel="canonical"> so search engines know which URL variant to index.

  • Multiple H1 headings found

    SEO

    Keep a single H1 per page and demote the others to H2/H3.

+6 more issues — details in the sections below.

65

SEO

6 issue(s) found

100

Performance

134 ms

75

Security

HTTPS & header checks

60

Accessibility

2 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

Expirované domény .cz

Contact

Email, phone, and address published on this site's own pages.

Meta tags

Title
257.cz - Domény, expirované domény
Description
Expirované domény .cz
Canonical
Language
Charset
utf-8
Viewport
width=device-width, initial-scale=1.0
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

jQueryNginx

Hosting & CDN

CDN provider
—
IP address
37.205.13.38
ASN
AS24971 (MASTER-AS - MasterDC s.r.o., CZ)

DNS records

TypeValue
A
  • 37.205.13.38
AAAA
  • 2a03:3b40:fe:2cd::1
MX
  • mail.shy.cz
TXT
  • google-site-verification=B2jXH3sfzArrYqOrZBupgE5xLjc-Uxz3Zd2fuHp8ZPE
  • v=spf1 include:_spf.shy.cz include:_spf.google.com ~all
NS
  • ns1.257.cz
  • ns2.257.cz
CAA
  • 0 iodef "mailto:root@257.cz"
  • 0 issue "letsencrypt.org"
CNAME—
IPv6 supportYes

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
257.cz
Valid from
May 27, 2026
Valid to
Aug 25, 2026
Days until expiry
32
SAN domains
257.cz, www.257.cz

Security headers

  • Strict-Transport-SecurityEnabled
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 4 · H2 5 · H3 0

Links

17 internal · 0 external · 1 broken

Images

1 total · 1 missing alt

Scripts / Styles

3 scripts · 4 stylesheets

JS / CSS size

81.9 KB · 31.9 KB

Page size

7.1 KB

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Missing canonical link
  • Multiple H1 headings found
  • No structured data (JSON-LD) found
  • Missing OpenGraph tags
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

  • Over half of images are missing alt text
  • Missing <html lang> attribute

Scan details

Requested URL
https://257.cz
Final URL
https://257.cz
HTTP status
200
HTTP version
HTTP/1.1
Response time
134 ms
HTML size
7.1 KB
Redirect chain
https://257.cz

See something wrong on this report? Request a correction

Related websites

Same technology stack

hallensteins.co.nz

Hallensteins | Menswear NZ

100
nginxphpjquery
Fastly· Fastly

iquw.com

Home | Starr | IQUW

100
wordpressnginxgoogle-analytics
AWS

quago.io

Home - Quago

100
wordpressnginxgoogle-analytics

mafc.com

Your Agricultural Lending Company | Horizon Farm Credit

99
nginxdrupaljquery
Fastly· Fastly

ipmb.com

IPMB - Real. Digital. Gold.

99
wordpressnginxgoogle-analytics
Google Cloud

epbb.com

Local, Expert Insurance Agents | EPB&B Insurance - Portland, OR

99
wordpressnginxgoogle-analytics
DREAMHOST-AS - New Dream Network, LLC, US

Frequently asked questions

What technology does 257.cz use?
257.cz is built with jQuery, Nginx.
Is 257.cz secure (HTTPS)?
Yes. 257.cz uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Aug 25, 2026.
Who hosts 257.cz?
257.cz is hosted on MASTER-AS - MasterDC s.r.o., CZ.
What is 257.cz's SEO score?
257.cz scored 65/100 for SEO in the latest analysis (fair).
What is 257.cz's overall website score?
257.cz has an overall SiteGraph score of 75/100, combining SEO, performance, security, and accessibility.