What is the dtCookie* cookie?
This cookie is used by RUM API, Dynatrace Real User Monitoring (RUM) gives you the power to know your customers by providing performance analysis in real time.
Our October 2026 scan found it on 31 sites (1% of the 2,450 we scanned), set before any consent.
- Purpose
- Analytics
- Belongs to
- Dynatrace
- Set as
- First-party (under the site's own domain)
- Typical lifetime
- Session (vendor says: Session)
- Name
- A family of cookies: the part after dtCookie varies by site or account.
Sites that set dtCookie* before consent
The highest-ranked 30 of 31 sites.
- autodesk.com6 tracking companies
- costco.com3 tracking companies
- inps.it1 tracking company
- vtb.ru4 tracking companies
- house.gov1 tracking company
- gallup.com1 tracking company
- energy.gov4 tracking companies
- ford.com17 tracking companies
- bt.com3 tracking companies
- fcc.gov1 tracking company
Show 20 more sites
- instructables.com4 tracking companies
- telenet.be2 tracking companies
- nyc.gov2 tracking companies
- chase.com0 tracking companies
- santander.com.br7 tracking companies
- aa.com0 tracking companies
- huntington.com9 tracking companies
- united.com7 tracking companies
- sber.ru6 tracking companies
- carnival.com3 tracking companies
- studentaid.gov7 tracking companies
- westernunion.com5 tracking companies
- aaa.com1 tracking company
- byu.edu2 tracking companies
- bspb.ru2 tracking companies
- kaiserpermanente.org4 tracking companies
- juntadeandalucia.es2 tracking companies
- correios.com.br2 tracking companies
- rogers.com14 tracking companies
- ulta.com26 tracking companies
Related cookies
Other cookies from Dynatrace.
- dtPC*22 sites
- rxVisitor*22 sites
- dtSa17 sites
- rxvt17 sites
How to stop it
Declining non-essential cookies in a site's consent banner should stop dtCookie* being set on later visits. Blocking third-party cookies in your browser settings stops the third-party kind everywhere, and clearing cookies for a site removes any it already set.
Description from the Open Cookie Database (Apache 2.0).
Understanding this page
- How cookie lifetimes work, and why a 13-month _ga matters
What a cookie's "expires" field actually controls, why Google Analytics ships a 2-year default that many sites cut down to 13 months, and how Safari's 7-day cap on script-set cookies changes the picture.
- First-party vs third-party cookies (and why "first-party" still tracks you)
What the distinction actually means technically, why browsers only block one of the two, and how CNAME cloaking, server-side tagging and cookies like _ga let sites keep tracking under their own domain.
- How to block or limit trackers
Browser privacy settings, content blockers, Global Privacy Control and clearing cookies compared honestly — what each one actually stops, what it doesn't, and what it costs you in return.