# Username OSINT

Usernames can be used to correlate activity and information between multiple platforms. If we are hunting a particular person and have knowledge of a username and they are on Reddit, for example they may have provided information recently or in the past that, might narrow down who they are (Posts about car issues or local activities in particular city).

In some cases, where an email address can be linked to a username, we may be able to pull breached passwords from recent breaches and perform credential stuffing against the username, across multiple platforms.

Usernames can be searched with the web tools shown on this page. A couple of examples have been shown below.

### InstantUsername

![](/files/uZF6bKA6kB5gQyr5xkp5)

### NameCheckup

![](/files/IwClf4Nj9lFS8tt3NkJk)

### Sherlock

Sherlock is an excellent terminal based tool for hunting usernames down across multiple social media sites (323 at the time of writing):

**Github:** <https://github.com/sherlock-project/sherlock>

**Supported Sites:** <https://github.com/sherlock-project/sherlock/blob/master/sites.md>

```bash
sudo apt install sherlock
```

The following commands can be used to search using Sherlock:

```bash
# For a single user
sherlock <User>

# For multiple users
sherlock <User1> <User2> <User3>

# Make requests over TOR
sherlock -t <User>
```

![](/files/jR1odcFvlxxyHzP4KMRv)

### UserSearcher

![](/files/llN4mTWNG3lkM4RPUgQq)

## Resources

* **InstantUsername:** [https://instantusername.com](https://instantusername.com/#/)
* **NameCheckup:** [https://namecheckup.com/](https://namecheckup.com)
* **NameChk:** [https://namechk.com/](https://namechk.com)
* **WhatsMyName:** [https://whatsmyname.app/](https://whatsmyname.app)
* **UserSearcher:** <https://www.user-searcher.com>


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://viperone.gitbook.io/pentest-everything/everything/everything-osint/username-osint.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.