# Search Domains

Search Deepinfo's domain and subdomain data by name, WHOIS, DNS, SSL and website fields, sort and trim the results, and export them.

Source: https://docs.deepinfo.com/guide/dsi/domain-search/

Last updated: 2026-09-26

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Domain Search queries Deepinfo's data on domains and subdomains across the internet. Search by name, or combine
filters on registration (WHOIS), DNS, certificates (SSL), website data and name properties. Each result opens a
full record of the domain.

## Before You Start

- **Package:** Deep Search & Insights (DSI), with Domain Search included. Without it, the page shows a notice that it is not included in
  your package.
- **Role:** Admin or Member.

## Where to Find It

**Sidebar:** **DEEP SEARCH & INSIGHTS** › **DOMAIN SEARCH** · [https://platform.deepinfo.com/app/dsi/domain-search](https://platform.deepinfo.com/app/dsi/domain-search)

The breadcrumb reads **DSI / DOMAIN SEARCH**. The page uses page tabs; see
[Page tabs](/guide/dsi/#page-tabs-in-domain-search-vulnerability-search-and-instant-lookup).

## Read the Screen

![Domain Search before the first search, numbered 1 to 4.](/img/guide/dsi/domain-search-01.png)

1. **Page tabs:** the first tab is **Domain Search**.
2. **Search box** (**Search domain...**) with the tabs **FILTERS** and **SAVED SEARCH**. Saving searches is not
   available, so **SAVED SEARCH** has no effect.
3. **Filter groups:** **DOMAIN TYPE**, **WHOIS**, **DNS**, **SSL**, **WEBDATA**, **DOMAIN NAME**, **EXTENSION**
   and **SUBDOMAIN**, then **HIDE FILTERS** and **SEARCH**.
4. Before your first search, a **Did you know?** panel shows a fact about domains.

## Search by Typing

1. Type a domain name, for example `acme.example`, in the search box.
2. A list of suggestions opens. For a domain name they are:
   - **OPEN IN NEW TAB**: open the domain's record in a new page tab (see
     [Domain details](/guide/dsi/domain-details/)).
   - **EXACT DOMAIN**: search for this name.
   - **SPLIT INTO PARTS**: search the name and the extension separately.
   - **OTHER EXTENSIONS**: the same name under other extensions.
   - **ALL SUBDOMAINS**: the domain's subdomains.
   - **LOOKALIKES**: names that look like this one.
   - **USES THIS NAMESERVER** and **USES THIS MAIL SERVER**: domains that share its name server or mail server.
3. Pick one with the mouse, or move through the list with the keyboard; the hints at the bottom of the list
   show the keys (**NAVIGATE**, **ADD TO FILTERS**, **REPLACE FILTERS**, **BACK**).

Other input, such as an e-mail address, an IP address, a URL or a plain keyword, gets its own suggestions.

Picking **EXACT DOMAIN** opens a new page tab and runs the search at once. Its results can include the
domain's subdomains; to keep only domains, add a **DOMAIN TYPE** filter.

![The suggestion list for a typed domain name, from OPEN IN NEW TAB to USES THIS MAIL SERVER, with the keyboard hints.](/img/guide/dsi/domain-search-02.png)

## Search With Filters

1. Select a filter group, for example **WHOIS**, and pick a field.
2. Choose the rule (**MUST**, **MUST NOT** or **SHOULD**), the operator and the value.
3. Add more rules if you need them, then select **SEARCH**.

The **FILTERS APPLIED** bar shows each rule with its type, group, field, operator and value, for example
**MUST** **Domain Name → Domain Name** **EQUAL** `'acme.example'`. **CLEAR FILTERS** removes them all.

| Group | Examples of fields |
|---|---|
| **DOMAIN TYPE** | Domains only or subdomains only |
| **WHOIS** | Create, expiry and update dates; registrant details; registrar; name servers; privacy |
| **DNS** | A, AAAA, CNAME, MX, NS, SOA and TXT records; IP history |
| **SSL** | Validity dates, fingerprints, subject and issuer, self-signed and valid flags |
| **WEBDATA** | HTTP status codes, redirection, final URL, headers, cookies |
| **DOMAIN NAME** | Name, length, keywords, language, and whether it contains numbers, hyphens or confusable characters |
| **EXTENSION** | Extension, type (gTLD or ccTLD), IDN |
| **SUBDOMAIN** | Subdomain name, length and level |

See [Search, filter and export lists](/guide/basics/lists-filters-and-exports/) for how rules combine.

## Read the Results

![A Domain Search result list with the FILTERS APPLIED bar above it.](/img/guide/dsi/domain-search-03.png)

- **Count line:** how many domains were found, then **EXPORT** and **VIEW SETTINGS**.
- **Columns:**
  - **DOMAIN**
  - **CREATE DATE** (sortable)
  - **DOMAIN EXPIRE ON** (sortable)
  - **SSL CERTIFICATE**: the expiry date and **ACTIVE**, **EXPIRES SOON** or **EXPIRED**
  - **HTTP STATUS**: **OK**, or the status or error found
  - **IP ADDRESSES**: two addresses, then **+n** for the rest
- Select a row to open the domain's drawer; see [Domain details](/guide/dsi/domain-details/).

### Sort, Page Size and Columns

**VIEW SETTINGS** opens **View Options**:

- **Sort By**: pick a field and an order, then **APPLY** (**CLEAR** resets it). The fields are **Domain**,
  **Extension**, **DNS Last Change Date**, **SSL Last Change Date**, **Whois Last Change Date**,
  **Whois Create Date**, **Whois Expiry Date** and **Whois Update Date**.
- **Result Per Page**: 25, 50, 75 or 100.
- **SHOWN**: turn columns on or off.
- **Reset to Default View**.

## Export the Results

1. Select **EXPORT**.
2. In the **DOWNLOAD** dialog, choose the **FILE FORMAT** (**CSV** or **JSON**) and the **EXPORT SCOPE**
   (**DEFAULT**, **BASIC** or **EXTENDED**).
3. Select **DOWNLOAD**.

The export covers your current search; there is no choice between all and filtered records here. The dialog does
not describe what each scope contains.

## Good to Know

- Domain Search looks at the internet as a whole. For the assets you monitor, use
  [External Attack Surface Management (EASM)](/guide/easm/).

## Do This With the API

- Search: [Domain Search](/reference/discovery/domain-search/)
- The query model: [Search and filters](/getting-started/search-and-filters/), [Pagination](/getting-started/pagination/)