What is the KTPCACOOKIE cookie?
We use this cookie to check if third-party cookies are enabled on the user’s browser.
Our October 2026 scan found it on 15 sites (1% of the 2,450 we scanned), set before any consent.
- Purpose
- Functional
- Belongs to
- PubMatic
- Set as
- Third-party (under another company's domain)
- Typical lifetime
- 1 day (vendor says: 90 days) — shorter than the vendor documents
Sites that set KTPCACOOKIE before consent
The highest-ranked 15 of 15 sites.
- elpais.com7 tracking companies
- as.com7 tracking companies
- tenki.jp27 tracking companies
- oricon.co.jp36 tracking companies
- slate.com20 tracking companies
- idnes.cz42 tracking companies
- ctvnews.ca38 tracking companies
- iqm.com14 tracking companies
- stuff.co.nz19 tracking companies
- si.com13 tracking companies
Show 5 more sites
- jpost.com15 tracking companies
- rediff.com42 tracking companies
- estadao.com.br19 tracking companies
- kakaku.com22 tracking companies
- atlasobscura.com28 tracking companies
Related cookies
Other cookies from PubMatic.
- pi47 sites
- KADUSERCOOKIE14 sites
- chkChromeAb67Sec6 sites
- SyncRTB*6 sites
- chk5 sites
How to stop it
Declining non-essential cookies in a site's consent banner should stop KTPCACOOKIE 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.