whohostit.
EMAIL HOST & MX LOOKUP

Find out who
hosts your email.

Enter an email address or domain. We read its MX records
and tell you which mail provider handles its email.

An email address works too. Only the part after the @ is looked up. Live DNS lookup

Your browser sends the domain you search directly to Google Public DNS, RIPEstat, and the domain’s registry to fetch public records. We don’t store your searches on our servers.

CURIOUS? TRY

One domain. The bigger picture.

Hosting, registrar, expiry, DNS records, email, and security details appear here.

PUBLIC DATA. ONE SIMPLE LOOKUP.
THE SHORT VERSION

How an MX lookup finds an email host

Email for a domain is delivered to the servers listed in its MX (mail exchanger) records. The server names usually reveal the provider: *.mail.protection.outlook.com is Microsoft 365 and aspmx.l.google.com is Google Workspace, for example.

WhoHostIt lists the MX records in priority order, names the email provider when it recognises it, and shows the domain’s SPF and DMARC policies. SPF often lists the other services allowed to send mail for the domain, such as newsletters or help desks.

Common questions

Can I find out who hosts an email address?

Yes. Email hosting is set per domain, so for name@example.com we look up example.com. Every address at that domain uses the same mail servers. The part before the @ never leaves your browser.

What if the MX records point to a security gateway?

Many companies route mail through a filtering service such as Mimecast or Proofpoint first. You’ll see the gateway; the mailbox provider behind it isn’t published in DNS, although the SPF record sometimes hints at it.

Why are there no MX records?

A domain without MX records usually doesn’t receive email. A “null MX” record (0 .) states explicitly that the domain accepts no mail.

SMALL TOOL. CLEAR ANSWERS.

Under the hood, in three steps.

01

You bring the domain

Paste a domain or a full URL. We’ll find the hostname and its registered parent domain.

02

We connect the dots

Public DNS, routing data, and registry records reveal the domain’s infrastructure.

03

You get the bigger picture

Explore the details on this page or download a report. Private and unavailable data are labelled.

MORE FREE TOOLS

Every lookup runs the full report.

Website hosting checkerFind out who hosts any website, plus its registrar, DNS and email provider. Email address lookupCheck an email address: its format, provider, and whether its domain takes mail. Domain expiry & age checkerCheck when a domain expires, when it was registered, and how old it is. DMARC, SPF & DNSSEC checkerCheck a domain’s DMARC record, SPF record, and DNSSEC status. Nameserver lookupFind out who hosts DNS for a domain and see its nameservers.