🆚 DNS Prefetch vs. IAB TCF
- 📈 DNS Prefetch is much more popular than IAB TCF.
- 🌎 DNS Prefetch is more popular in the United States, the United Kingdom, and Japan.
- 🌍 IAB TCF is more popular in the British Virgin Islands.
DNS Prefetch
IAB TCFType
About
The rel="dns-prefetch" attribute on 
HTML <link> elements instructs web browsers to resolve domain names for external resources before those resources are requested.
It is commonly used for third-party domains serving scripts, fonts, analytics, advertisements, or media files, helping reduce DNS lookup latency and improve loading performance for external connections.
The Transparency & Consent Framework (TCF) is an open-source industry standard developed by IAB Europe that helps companies comply with GDPR and ePrivacy requirements when processing personal data in digital advertising ecosystems.
It defines technical specifications and policies for collecting and communicating user consent choices, standardizes how these preferences are shared between publishers, advertisers, and CMPs, maintains a centralized list of approved vendors, and ensures transparency by giving users clear control over how their data is used.
Headquarters
Categories
Popularity
Determined by the number of sites using each technology.
Market share
Popularity by country
Determined by the number of sites detected from each country.
Awards
- 🥇 Most popular in the United Kingdom in the Performance Optimization category.
- 🥇 Most popular in Japan in the Performance Optimization category.
- 🥇 Most popular in Italy in the Performance Optimization category.
- 🥇 Most popular in Australia in the Performance Optimization category.
- 🥇 Most popular in Canada in the Performance Optimization category.
- ⭐ 5th most popular in the British Virgin Islands in the Standards category.
- 🔥 13rd most popular in Nigeria in the Standards category.
- 🔥 13rd most popular in Bangladesh in the Standards category.
- 🔥 13rd most popular in Albania in the Standards category.
- 🔥 14th most popular in France in the Standards category.
Popularity by domain category
Determined by the number of sites in each category.
Top sites
Top-ranked sites that use these technologies.
Compare alternatives
Technologies with similar characteristics.
Speculation Rules
CSS
JSON
XFN🗃️ About This Data
- We evaluate the popularity of technologies based on the number of websites where we detect their usage.
- Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
- This report is based on the analysis of 3,511,995 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.