> For the complete documentation index, see [llms.txt](https://help.leadboxer.com/leadboxer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.leadboxer.com/leadboxer/extras/leadboxer-cookies.md).

# LeadBoxer cookies

The leadBoxer tracking script aka 'lead pixel' executes a script to set **first-party** cookies.

Here is an overview of the first-party cookies we set and the detail about these cookies;

These cookies are set on your own domain (first-party). They contain anonymous IDs and are used only to recognise returning visitors and to link page views to the same session. LeadBoxer does not set third-party cookies.

Default cookies

<table><thead><tr><th width="153">Cookie Name</th><th width="127">Expires</th><th>Description</th><th>Example value</th></tr></thead><tbody><tr><td>_ots</td><td>30 minutes</td><td>This cookie stores the (anonymous) Session ID of the website visitor</td><td>1.1646657290585.1646657290585.1646657290585</td></tr><tr><td>_otpe</td><td>30 minutes<br></td><td>This cookie stores the last visited page of the website visitor</td><td>https://www.mysite.com/nl/nl.html (URL encoded)</td></tr><tr><td>_otui</td><td>2 years</td><td>This cookie stores the (anonymous) user ID of the website visitor</td><td>602796880.1646657290585.1646657290585.1646657290585.1.1.0</td></tr><tr><td>_otr</td><td>30 minutes</td><td>This cookie stores the referrer (the site the visitor came from) of the current session</td><td>1646657290585.https://www.google.com/</td></tr><tr><td>_otor</td><td>2 years</td><td>This cookie stores the original referrer of the visitor's first visit</td><td>1646657290585.https://www.google.com/</td></tr></tbody></table>

If you enable **IP masking** in the dataset settings, visitor IP addresses are anonymised. See [How to mask IP addresses](/leadboxer/guides/how-to-mask-ip-addresses.md).


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