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IONOS » Hosting Provider | Websites. Domains. Server.
IONOS, your digital partner for cloud solutions and web hosting, supporting your needs from websites, domains, servers, and more.
IndustryOriginGlobal rankRank in United States
Updated at The higher the score, the more externally observable protections the system has recorded. This page does not certify that the website is reputable, legitimate, or completely free of vulnerabilities.
As of September 20, 2026 at 07:07, ionos.com has a security score of 89.7/100 (grade B: “Good”). CyStack’s automated assessment recorded 8 issues to review after completing 100% of applicable checks. The website owner should address “Allowed browser content (CSP)” first, then review the remaining items in order of impact.
At assessment time, CyStack did not find ionos.com or related infrastructure on any scam, phishing, or malware warning list after checking 5 online reputation sources. This result reflects external observations; it does not guarantee absolute safety or verify the organization’s legal status or reputation.
Check whether the website uses a secure connection and whether its HTTPS certificate remains valid.
Frequently asked questions
A valid SSL certificate still does not prove that ionos.com is safe, legitimate, or free of scam signals. For a more complete assessment, this report also checks phishing and malware, exposed email records, IPs and open ports, subdomains, technologies, and CVEs that may apply to observed versions.
ionos.com used a valid SSL certificate at assessment time, valid until October 7, 2026. This status may change when the certificate expires or the server configuration changes.
Review HTTPS and certificateData sources
CyStack compiles scan results from its internal cybersecurity monitoring systems, including CyStack VulnScan and CyStack Threat Intelligence, together with publicly available Internet data. The assessment only observes and analyzes information already available; it does not attempt unauthorized access, test passwords, send exploit code, or change or disrupt the assessed system.
CyStack VulnScan continuously discovers assets, validates vulnerabilities, and helps security teams prioritize remediation across the enterprise.
These 3 failed checks or warnings have the greatest impact on the result for ionos.com.
Why it matters
Content Security Policy (CSP) limits where scripts, styles, frames, and other browser content may come from. A strong policy reduces the impact if an attacker manages to inject content into a page.
What to do
Define only the sources the application needs, test the policy before activating it, and avoid broad wildcard (*) rules, unsafe-inline, and unsafe-eval where possible.
Scope of this check
This check only evaluates the homepage response and content that the scanner could reach. Other pages and sign-in flows may use different settings.
Evidence and check scope
References
Identify website protection and check whether public IPs appear on warning lists.
Check domain and email settings that help prevent brand impersonation.
Diagnostic information
The available certificate evidence was not sufficient to conclude this certificate requirement.
Evidence and check scope
Scope of this check
This check only evaluates the homepage response and content that the scanner could reach. Other pages and sign-in flows may use different settings.
Evidence and check scope
References
| Not listed |
| PSBL | Not listed | Not listed |
| SpamCop | Not listed | Not listed |
| blocklist.de | Not listed | Not listed |
| Spamhaus | Unavailable | Unavailable |
Recently completed assessments, prioritizing websites with a similar sector, country or security grade for easier comparison.
United States
