StackPulse detects Microsoft IIS on 3,343 websites — 2.15% of the 155,434 domains in the index — making it the #4 web server technology we track. Updated October 27, 2026.
StackPulse currently detects Microsoft IIS on 3,343 websites, which is 2.15% of the 155,434 domains in the index. The count is refreshed as the crawler re-scans the web.
How do I check whether a website uses Microsoft IIS?
Open the free StackPulse lookup, enter the domain and the web server section will list Microsoft IIS if its scripts, headers or markup are present. Developers can call GET /v1/lookup/:domain.
Can I download a list of websites that use Microsoft IIS?
Yes. Lead Export filters the index by Microsoft IIS (optionally combined with other technologies) and streams the matching domains as CSV, up to 50,000 rows per file.
What is Microsoft IIS?
Microsoft IIS is a web server technology. It ranks #4 of 4 web server technologies by number of websites in the StackPulse index.
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