This cookie name is being set on 20,667 websites and 8,901 distinct domains and we have seen it bein used in the following objects:

  • 20,667 HTTP cookies

Cookie origin and purpose

Below you can find the best information on this cookie we have at this moment. Please note it may be incomplete or inaccurate as there's vast population of cookies living out there on the web!

Cookie classification

  • unknown (confidence 0.3)
  • tracking (confidence 0.7)

Sample values

Sample value:
lo_33cd1ee0da4e
Sample value:
lo_66ddfac87bf
Sample value:
lo_921aa569efc7

Domains targeted by optimizelyEndUserId cookie

This list includes both third-party domains set by tracking and adversing companies, as well as the first-party domains of the websites that use this cookie name.

Websites setting optimizelyEndUserId cookie

Fully automated RESTful API is now available. Subscribe for your free trial today!