How can I tell who hosted a website in the past?¶

Reconstruct which infrastructure served the exact hostname during the relevant period, then trace that infrastructure through provider assignment records.

Build from DNS toward the customer¶

Historic DNS may show earlier addresses, nameservers or aliases. Address registration and routing can identify the likely network. CDN or reverse-proxy records may reveal that the visible address was only an intermediary and identify the origin used at the time.

Registrar changes, certificates, invoices, support messages, account creation, backups and migration records can strengthen or correct the technical timeline.

Think of historic hosting as tracing former premises: an old directory may identify the building, while leases and utility records identify the tenant and dates.

A historic IP-to-domain database is an observation source, not conclusive proof. It may miss short-lived changes, confuse shared hosting or record the CDN rather than origin. Record the source, observation date and query.

Once a provider is identified, use the hostname, address, resource identifier and exact time to establish which customer or reseller controlled it. Current ownership of the address is not enough because assignments change.