What does zillow.com track?
Before any consent, zillow.com loaded 4 tracking companies and set 3 advertising or analytics cookies.
That's more tracking companies than 70% of the 2,450 sites we scanned.
Scanned October 2, 2026 from Germany, loading www.zillow.com once and clicking nothing. How we scan
- Tracking companies
- 4
- Tracking cookies
- 3
- Third-party hosts
- 27
- Cookies in total
- 17
Consent banner
No known consent management platform was detected on the page.
Companies contacted before consent
5 of the 13 companies it contacted before consent were unclassified.
- Google Ads1 requestAdvertising
pagead2.googlesyndication.com
- Google Analytics3 requestsAnalytics
www.google-analytics.com, www.googletagmanager.com
- Scorecard Research (Comscore)3 requestsAnalytics
sb.scorecardresearch.com
- Datadog1 requestAnalytics
www.datadoghq-browser-agent.com
Other third parties (content delivery, consent, functional, unclassified)
- zillowstatic.com29 requestsUnclassified
www.zillowstatic.com
- zg-api.com8 requestsUnclassified
cs.zg-api.com, cdn.zg-api.com, e.zg-api.com, rum.zg-api.com
- split.io6 requestsUnclassified
sdk.split.io, auth.split.io
- crcldu.com2 requestsUnclassified
crcldu.com
- pubnub.com1 requestUnclassified
cdn.pubnub.com
- DataGrail1 requestConsent banner
api.consentjs.datagrail.io
- HUMAN Security (PerimeterX)17 requestsFunctional
collector-pxhyx10rg3.px-cloud.net, ift.px-cloud.net, js.px-cloud.net, ri.px-cloud.net
- Google6 requestsFunctional
fonts.googleapis.com, accounts.google.com, fonts.gstatic.com
- Sentry1 requestFunctional
o168728.ingest.sentry.io
Cookies set before consent
The longest-lived tracking cookie it set was _ga, from Google Analytics, lasting about 13 months.
| Cookie | Purpose | Set by | Lasts |
|---|---|---|---|
| _dd_s | Analytics | www.zillow.com | Under a day |
| _ga | Analytics | zillow.com | 13 months |
| _gid | Analytics | zillow.com | 1 day |
| XZGID | Unclassified | zg-api.com (third party) | 13 months |
| zg_anonymous_id | Unclassified | zillow.com | 12 months |
| zgsession | Unclassified | zillow.com | Session |
| zguid | Unclassified | zillow.com | 13 months |
| zjs_anonymous_id | Unclassified | zillow.com | 12 months |
| zjs_user_id | Unclassified | zillow.com | 12 months |
| zjs_user_id_type | Unclassified | zillow.com | 12 months |
| g_state | Functional | www.zillow.com | 6 months |
| JSESSIONID | Functional | www.zillow.com | Session |
| _px3 | Necessary | zillow.com | Under a day |
| _pxvid | Necessary | zillow.com | 12 months |
| datagrail_consent_id | Necessary | www.zillow.com | 12 months |
| datagrail_consent_id_s | Necessary | zillow.com | 12 months |
| pxcts | Necessary | zillow.com | Session |
The page also wrote 200 keys to local storage, which works like a cookie but isn't sent with requests.
Understanding this page
- How to see which cookies and trackers a website loads
A hands-on walkthrough for checking what a site sets before you've clicked anything, using Chrome and Firefox's built-in tools, plus how CookieTosser automates the same check every month.
- What counts as valid cookie consent in the EU
The rules that actually govern cookie banners — the ePrivacy Directive, the GDPR consent standard, the Planet49 ruling, the strictly-necessary exemption, and what "reject" has to offer compared with "accept.
- Consent management platforms explained
What a CMP banner is actually doing behind the scenes, how the IAB's TCF standard and Google's Consent Mode v2 fit in, and why a banner being present is no guarantee that nothing loads before you answer it.