List of 51 Million Websites with Full HTTP Headers
The Ultimate Dataset for Technology Fingerprinting,
Marketing Intelligence & Research

What Is This Dataset?

This List of 51 Million Live Websites with Full HTTP Headers is a massive, highly enriched dataset designed for deep internet analysis, technology fingerprinting, competitive research, and large-scale marketing intelligence. Each domain in this dataset has been verified as live and includes complete HTTP response header data collected directly from active websites. This provides powerful visibility into the technologies, hosting infrastructure, security configurations, and server environments powering millions of websites worldwide.

Instead of running large-scale crawlers or maintaining your own infrastructure scanning tools, this dataset provides a structured, ready-to-use snapshot of real-world website technology stacks.

What’s Included

• Over 51,000,000+ live and accessible websites
• Full HTTP response headers captured from each domain
• Server technology identifiers (Apache, Nginx, IIS, LiteSpeed, etc.)
• Hosting and infrastructure fingerprints
• Security headers including CSP, HSTS, X-Frame-Options, and more
• Content-Type and encoding information
• Redirect and response metadata
• Top-Level Domain (TLD) classification (.com, .net, .org, ccTLDs, etc.)
• Additional parsed metadata for fast filtering and segmentation

This level of technical visibility allows you to understand how websites are built and hosted without manual inspection or scanning.

Key Use Cases

Technology Fingerprinting & Infrastructure Analysis
Identify server technologies, hosting environments, security configurations, and CDN usage across millions of websites. Ideal for cybersecurity research, SaaS market analysis, and infrastructure intelligence.

Targeted B2B Marketing & Lead Generation
Build highly targeted prospect lists based on detected technologies and infrastructure choices. Perfect for companies selling hosting, SaaS tools, security products, developer tools, and enterprise software.

Cybersecurity & Risk Research
Analyze adoption of modern security headers and identify outdated or vulnerable configurations across industries and geographic regions.

Competitive Intelligence
Understand which technologies your competitors and their customers rely on. Discover migration trends, platform adoption patterns, and infrastructure shifts across markets.

Market & Industry Technology Trends
Track global technology adoption across industries by analyzing server types, CDN usage, and security implementations at massive scale.

AI, Machine Learning & Data Science
Train models using real-world web infrastructure data. Ideal for technology classification, anomaly detection, clustering, and predictive modeling across internet-scale datasets.

Who This Dataset Is For

• SaaS and B2B marketing teams
• Cybersecurity researchers and analysts
• Technology intelligence platforms
• Hosting and infrastructure providers
• Data scientists and AI engineers
• Market research firms
• Growth agencies and consultants

If your business depends on understanding how websites are built, hosted, or secured, this dataset provides unmatched visibility and scale.

Download & File Formats

The dataset is delivered as a compressed .zip archive and is approximately 44GB uncompressed. It is included in MySQL format - Optimized for scalable querying and database deployment

Training & Support

Full onboarding guidance is included to help you extract maximum value from the dataset. Training covers:

• Installing and configuring MySQL
• Importing large datasets efficiently
• Querying HTTP header data for technology filtering
• Extracting targeted segments for marketing and research
• Performance optimization when working with large-scale web datasets

In Short

This dataset is more than a list of domains — it is a comprehensive map of global web infrastructure. With full HTTP header intelligence across 51 million websites, it enables deeper insights, stronger targeting, and advanced research capabilities across marketing, cybersecurity, SaaS intelligence, and data science.

Dataset Pictures

MySQL Table MySQL Table of 51 million websites HTTP headers dataset

Filtered By TLD MySQL Table of 51 million websites HTTP headers filtered by TLD

Filtered By Niche MySQL Table of 51 million websites HTTP headers filtered niche

Filtered By Technology MySQL Table of 51 million websites HTTP headers filtered by technology


Video Demo



MySQL Dump
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Hi everyone, it's Jamie from anysoftwareyouwant.com and in this video we're going to give you a lightning quick demo of our huge 51 million entry dataset of websites and their full HTTP headers. Now it's actually 51.7 million but we like to over deliver on our datasets just because often there's websites that go offline quickly etc. This dataset contains well over 99% of the live websites online and let's have a quick browse through it now so we can see what's in it. So from the left here we have the domain name, we have the HTML title we extracted from the website, we have the HTML tag description which we've extracted from the website. We've got the TLD so you can filter to certain domains such as .co.uk if you want to do geographic targeting. And here we have the categories and the scoring system. So each website is ran past a predefined set of keywords that are related to certain niches. So for example if we want to tell if a website is in a fitness niche we'll have a list of keywords like gym, gym equipment, exercise etc. And depending on how many of those keywords we find in the website's description and title we can then put them into a category. So we have a broad category and a precise category and also we have a secondary category because sometimes websites like blogs etc. They can span multiple categories. Now when we think we found a category for a website we give it a score. So what that score tells you is how certain we are that our website should be in that category. So if you might be doing an outreach campaign where if you're sending messages and you end up targeting the wrong audience because you think they're in a certain category and they're actually another one then it could hurt your bound... People might mark your messages as spam etc and damage the outcome of your campaign. So if you really want to know that you're targeting the right websites in your outreach or whatever you're doing with a dataset then you can put the match score higher up. And then finally here we have the headers that we've collected from every website that we've crawled. As you can see those are the full headers returned from each web server. So we'll give a quick little demo now of how you might search through HTTP headers. So we've got a simple like search here where we're trying to find all the websites of Laravel in the HTTP headers. So as you can see this query has returned 172,000 websites with Laravel in their headers. Obviously this is great if you're a web development agency and you specialize in Laravel. You can filter it down further by particular niches in the categories here or keywords in the title description or even TLDs to target websites in your own country. And if we move over here and have a look at the headers there you can see the Laravel session name there and again there. So hopefully you can see how powerful this dataset is for finding tech leads, market research, anything like that. So as always thank you for watching.




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