Website hosting can be surprisingly difficult to identify because the company that built the site, the registrar, the DNS provider, CDN and physical server can all be different organisations. Start with your own records, then use technical clues to narrow it down.
Check invoices and old emails first
Search for terms such as hosting, cPanel, Plesk, renewal, server, SSL, WordPress, nameservers and domain. A receipt or welcome email often gives a more reliable answer than an automated lookup.
Look at the domain's nameservers and DNS
Nameservers can identify the DNS provider and sometimes the hosting company, but not always. Services such as Cloudflare can sit in front of a completely different host, and agencies may use branded or third-party DNS.
DNS records can still reveal useful clues such as the IP address receiving web traffic and the provider handling email.
An IP address is a clue, not proof
Looking up the site's IP can suggest which network or datacentre serves the website. Shared hosting, reverse proxies, CDNs and cloud platforms can make that result misleading, so treat it as part of the investigation rather than a definitive answer.
WordPress may reveal hosting information
If you can log into WordPress, Site Health and installed hosting plugins may identify parts of the environment. Hosting access, backup plugins and SMTP settings can also show whether the site and email live together or separately.
Ask what account the business can actually control
Finding the technical host is only half the problem. You also need to know whether the business has an account with that provider or whether everything sits inside an agency's reseller account. That affects how a takeover or migration is handled.
Do not cancel the old account until dependencies are mapped
The same hosting package may contain website files, databases, mailboxes, DNS records, cron jobs or other services. Copy and document first. Cancel only after the replacement website and any email/services have been tested.
Why the answer can be confusing
A domain may be registered at one company, use Cloudflare for DNS, point to a server owned by another host and be billed through a web-design agency. On top of that, email might live at Microsoft or Google. That is why “who hosts my website?” often produces several company names. The migration plan needs to identify which company controls each layer rather than looking for one universal provider.
What to hand to a new provider
If you can, provide the domain name, registrar login, hosting/control-panel login, CMS administrator access and copies of recent invoices. If you cannot, just provide the domain and explain what you know. A competent takeover team can usually start mapping the public infrastructure before asking you to chase every missing credential.