Reverse Email Lookup

A reverse email lookup is the inverse of a normal contact search. You start with the address. The tool returns the person, the company or the network behind it.

Most people leave a trail. Forum posts, comment sections, mailing lists, profile signups: each one ties an address back to a real identity. We collect those traces from publicly available sources across multiple countries and consolidate them into a single profile. If the owner is active on social media, runs a website or has been quoted in public records, the lookup will surface it.

Whose email is this? If the answer sits anywhere in public, the lookup will get you closer. If it is a brand-new account on a freemail provider with zero footprint, the lookup will tell you that too: there is no trail to find.

A free Emailsherlock report assembles everything we have on a given address into one view:

1. ✓
   Full name, where public
2. ✓
   Social media profiles (Facebook, LinkedIn, Twitter, Instagram and others)
3. ✓
   Host reputation and trust score
4. ✓
   SPF, DKIM and DMARC posture of the sending domain
5. ✓
   Blacklist status of the host's IP
6. ✓
   Spam reports filed against the address
7. ✓
   Disposable, freemail and catch-all classification
8. ✓
   Public records, where indexed
9. ✓
   Demographic and employment hints, where matched

Most looked-up emails in the last 30 days

Snapshot Jun 21, 2026 23:11. Open the full last-30-days list.

An email address is often the only handle you need to identify someone. From there a lookup can return a name, a city, a phone number, a list of linked social accounts, and the broader contact graph that ties them together. Some people call this an "email background check". Same idea, narrower scope.

The free version returns less depth than a paid investigative service. It is a good starting point: most of the time it answers the only question you actually had.

When the address is tied to public records, the report can extend into court filings or business registrations. That is the moment the lookup turns from "who is this" into "should I trust this".

Some methods stop at the surface. Others go deeper and pull employer, IP or revenue data. The six below cover the ground most investigators do by hand: Gmail, Hotmail and MSN searches, plus the domain side.

1. Google search

The simplest first move. Drop the address into Google and the engine pulls back any page that quotes it: profile pages, mailing lists, GitHub commits, support threads.

Google often returns not only the name but also the company and a LinkedIn profile in the same result. The Images tab sometimes adds a face.

2. Google Account name lookup

Open a Google Sheet, paste the address into a cell, hover. If the address belongs to a Google account, the tooltip reveals the account holder's name.

From the name a normal Google search lands you on the LinkedIn profile in two more clicks.

3. LinkedIn

LinkedIn is the strongest source for professional email addresses. With over 900 million members it covers most office workers in the developed world. Paste the address into the search bar; if the network has matched it before, the profile shows up.

When the address is in the company.com format, the trick is to guess the naming pattern (firstname.lastname, flastname, etc.) and search by name instead.

4. Facebook

Facebook indexes private addresses if the owner left them public on their profile. Paste into the Facebook search bar. Hits are rare but high-signal: if Facebook returns a profile, the address is current.

Facebook is better for personal addresses; LinkedIn is better for professional ones.

5. Domain checker

For company addresses, the right place to start is the domain itself. Our domain checker shows the registrar, the registration and expiry dates, the DNS posture and whether the domain is parked or live. Inconsistencies (a "law firm" registered last week on Namecheap, no website, no MX) are a strong scam signal.

6. ICANN lookup

ICANN's WHOIS lookup gives the same domain registration data as our checker, with one caveat: registrars are allowed to redact owner contact details, and most do for privacy. Useful as a second source.

Each freemail provider exposes different metadata. The lookup form above works for any address, but the signal you get back depends on where the mailbox lives.

Gmail

Gmail addresses are the most-searched group on Emailsherlock. Google indexes most public Gmail addresses through Google Sheets and Gmail account linking, so name resolution works well. Our report adds host trust score, freemail classification and any spam reports linked to the address. For deep host data, see the Gmail host page.

iCloud and Apple Mail

iCloud and @me.com addresses are harder. Apple does not expose account-holder data through public APIs, and iCloud's "Hide My Email" relay system mints throwaway @icloud.com aliases that mask the real address entirely. A reverse lookup on @icloud.com therefore tends to return little personal data and a clean host reputation, which on its own tells you little about who sent the mail.

Yahoo Mail

Yahoo, AOL and Verizon addresses share Yahoo's mail backbone. They tend to be older accounts with longer footprints; the social trail is often richer than for a fresh Gmail. Our report identifies the freemail class and the underlying host reputation.

Outlook, Hotmail and Live

Microsoft consolidates outlook.com, hotmail.com, live.com and msn.com onto the same backbone. The host trust score and DNS posture are the same across the four. Name resolution is weaker than Gmail because Microsoft does not surface account holders through Google Sheets, but the address can still be matched against social profiles.

AOL, ProtonMail and other providers

AOL is a Yahoo property; the same caveats apply. ProtonMail addresses are by design opaque: ProtonMail does not require a recovery email, and the encryption story actively discourages metadata exposure. The lookup will tell you the host is privacy-focused, not who the user is. For any other provider, our report still returns host reputation, DNS posture and any spam reports on file.

"Whose email is this" usually translates into "show me their social profiles". An address attached to LinkedIn, Facebook, Twitter, Instagram, Pinterest, Quora or GitHub leaves a tag we can match. The lookup pulls those matches into one view so you do not have to paste the same address into seven different search boxes.

Profile resolution depends on the user's privacy settings. Most networks let members hide their address from search; we surface what is left visible and tell you when there is nothing to find.

For username-style searches, the local-part of the address (everything before the @) is often the same handle the person uses on other networks. Once the lookup gives you that local-part, a quick search on Reddit, GitHub or Stack Overflow with the same handle frequently fills in the rest of the picture.

Reverse email search is keyword search with a twist. A normal search engine takes a name and returns pages. A reverse engine takes an address and returns the network of references that contain it.

We index a database of billions of addresses, sourced from public crawls, partner data and our own user submissions. When you submit an address, we match it against that index, fetch the associated metadata and combine it with a live check of the host's DNS posture, blacklist status and authentication setup.

The database grows every time someone runs a public lookup. That includes the searches our own users have run in the last few months. If your address appears in our results because someone else looked it up, you can remove it via the opt-out tool.

Two main groups run lookups, and they want different things from the same report.

If you triage email all day, the third path is a browser extension. Our extension reads the address you are looking at on any page (Gmail, LinkedIn, your CRM) and pops the lookup result inline, so you do not have to copy-paste between tabs.

See the Chrome extension page for install and feature details.

A blacklist hit on the sending IP is the first hard signal that the address is part of a spam pipeline. Blacklists score IPs, not addresses, so for freemail providers (Gmail, Yahoo) the check tells you about the provider's overall reputation rather than the individual mailbox. For company domains it lights up immediately.

Every Emailsherlock lookup includes a blacklist scan against the major DNSBL providers and several open-source feeds. Use the standalone blacklist tool to check an address or IP directly. Want to verify your own sending IP first? The My IP tool shows the public IP your connection is on.

Every lookup gets a single trust score that rolls up the public footprint, the host reputation and the technical DNS check. Different sources contribute different evidence; the score is the consolidation, not a black-box opinion.

We complement the public-data side with a live technical scan via our DNS lookup tool, which tracks the technologies the email host runs. That gives us an objective read on the trustworthiness of the host itself, independent of any spam history.

Privacy matters. If you want your address removed from our index, the opt-out tool handles it. For the bigger picture, see our guide on how to remove personal information from the internet.

Snapshot Jun 21, 2026 00:00. Open the last-30-days host list.