cls.cz
HTML metadata
Technology
- Server
- openresty
- Stack
- PHP
- Analytics
-
- Google Tag Manager
- Fonts
-
- Google Fonts
Third-party hosts loaded (5)
- os-master.mdcdn.cz×59
- fonts.googleapis.com×1
- fonts.gstatic.com×1
- platform-api.sharethis.com×1
- www.googletagmanager.com×1
Social
Contact
- Phone
- Address
- Sokolská 31/490, 12026, Praha 2
Registration
- Registrar
- REG-INTERNET-CZ
- Created
- 1997-08-28
- Expires
- 2026-10-26 147 days left
- Updated
- 2026-03-25
- Name servers
-
- ns-1.dccomp.cz
- ns-2.dccomp.cz
DNS records live
- NS
-
- ns-1.dccomp.cz
- ns-2.dccomp.cz
- MX
-
- 10 cls-cz.mail.protection.outlook.com
- Verified for
-
- Microsoft 365
Email authentication strong
- SPF
-
v=spf1 include:spf.nethost.cz include:_spf.meditorial.cz include:spf.protection.outlook.com ip4:82.142.82.201 -allstrict (-all) - DMARC
-
v=DMARC1; p=quarantine; rua=mailto:abuse@cls.cz; sp=quarantine; adkim=s; aspf=s;policy: quarantine · sp=quarantine - DKIM
-
- default:
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDkqiSTGcYycHoqJ1JT3OZWUZqcnCcQut5HSX6MpAOBnNp2e7YPs38A4iTt3lS/AZvCfnMyiaZdpRCe1foZ7p… - selector1:
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1iwikNwzHXNlULwJgZopEwWlRr793/gXEw3FH32OokuHaWJ0VY1z1/RqkT7z0PRVHy0G+3/F3Q1T1n…
selectors probed - default:
Certificate (current)
E7
Expires in 30 days
HTTP security headers
- 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; preload
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