To help you identify legitimate communications from Cyberis, we’ve listed all the domains we use across email, websites, and other services. If you receive a message claiming to be from us, from a domain not listed here, please treat it with caution and report it to our team at [email protected].

Primary Domains

These domains are used routinely for email, our website, and link shortening:

• cyberis.com
• cyberis.co.uk
• cyber.is (used exclusively for link shortening — not for email or direct communication)

Other Attributable Domains

These domains are owned by Cyberis to help protect our brand from impersonation attacks. They are not routinely used for communications, and you should not expect emails to originate from these addresses:

• cyberisclient.com
• cyberis.uk
• cyberis.ninja
• cyberisltd.com
• cyberisltd.co.uk
• cyberislimited.com
• cyberislimited.co.uk

Security Testing Domains

These domains are used exclusively for authorised security testing:

• cyberis-testing.site

Please note that this site may appear on threat intelligence feeds, blacklists, and watch lists due to the nature of the security testing conducted from this domain during authorised penetration tests. All activity observed from this domain is fully authorised by our clients as part of a formal engagement.

We also use other domains during red team engagements. These are not listed here to preserve the operational security (OpSec) of those engagements.

If you have any questions or concerns about a domain or communication you’ve received, please contact us at [email protected].