Karazin Educational and Scientific Institute of Ecology

Once a month, an automated check requests the original address of every archived website and records whether the server responds. The check runs from a server in the United States.

• A site counts as online if the server answers normally, or if it answers but refuses automated visitors (for example with a bot-protection page).
• A site counts as offline if the address returns "not found" or a server error, if the request times out, or if the domain no longer exists.

How to read the result

• Offline does not necessarily mean gone for good. Servers can be down temporarily, sites move to new addresses, and many Ukrainian sites block visitors from abroad, which can look the same as being offline.
• Online does not guarantee that the original content is still there. A domain can expire and be taken over, parked or replaced by a different site, and an error page can still come with a normal response.
• Older checks were imported from SUCHO's earlier records and may have followed slightly different rules.

Treat the status as a signal, not a verdict. If you know more about a site, please contact info at sucho.org.