What is the guid cookie?
We don't have a vendor description for this cookie yet, but our scan shows it's set by Mediascope (TNS Counter), and it typically lasts 12 months. It's listed as analytics.
Our October 2026 scan found it on 25 sites (1% of the 2,450 we scanned), set before any consent.
- Purpose
- Analytics
- Belongs to
- Mediascope (TNS Counter)
- Set as
- First-party on 8% of sites, third-party on 92%
- Typical lifetime
- 12 months
- Where it's common
- 44% of the sites that set it use a .ru domain.
Sites that set guid before consent
The highest-ranked 25 of 25 sites.
- vk.ru2 tracking companies
- ok.ru6 tracking companies
- ivi.ru10 tracking companies
- livejournal.com11 tracking companies
- instructure.com17 tracking companies
- rambler.ru9 tracking companies
- earthlink.net10 tracking companies
- primis.tech11 tracking companies
- screenconnect.com7 tracking companies
- kinopoisk.ru2 tracking companies
Show 15 more sites
- ria.ru4 tracking companies
- 2gis.ru5 tracking companies
- lenta.ru9 tracking companies
- guard.io14 tracking companies
- alchemer.com13 tracking companies
- smartsheet.com6 tracking companies
- ctrip.com3 tracking companies
- acorns.com20 tracking companies
- island.io17 tracking companies
- mk.ru6 tracking companies
- biglobe.ne.jp2 tracking companies
- rice.edu8 tracking companies
- iz.ru8 tracking companies
- interfax.ru3 tracking companies
- theweathernetwork.com21 tracking companies
How to stop it
Declining non-essential cookies in a site's consent banner should stop guid 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.
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.