Websites using IIS

Q: How does VersionDB detect IIS?

Through our own crawl, which checks each site's HTML, scripts and headers rather than relying on self-reported data.

Q: How current is this data?

The figures on this page come from our September 2026 crawl. VersionDB runs a fresh crawl every month, and the database spans multiple monthly crawls.

Q: Can I download a list of IIS websites?

Yes. The Lead List Exporter lets you filter the 1,120,221 IIS sites by country, traffic and contact details, see the row count for free, and pay once for the rows you export. To try it first, the Free Lead List Exporter exports up to 10 matching domains at no cost, from a subset of our crawl.

Web servers

Internet Information Services (IIS) is an extensible web server software created by Microsoft for use with the Windows NT family.

Lead List Exporter

1.1M live IIS sites, ready to export.

That's how many IIS websites are in VersionDB right now, each with its full tech stack, contact details, and social profiles.

Pick a ready-made template, or build your own filters in the Lead List Exporter and pay only for the rows you export.

Open the Lead List Exporter

Just need a few domains? Export up to 10 free from a subset of our crawl.

Start with a list template

IIS companies in the United States

Every IIS website we detected in the United States.

Companies with personnel emails

Only sites where a personal, company-hosted email was found.

Decision makers on LinkedIn

Sites with at least one personnel LinkedIn profile.

Top 100,000 IIS sites by traffic

Start with the highest-traffic end of the dataset.

Sites on a .com domain

Limit results to IIS websites on .com domains.

Companies with phone numbers

Only sites where an organisation phone number was found.

Create your own

Versions

Which IIS versions are most used?

We could read a version number on over 99% of IIS sites. Of those, the most common are IIS 10, on 848,653 sites, IIS 8, on 150,138 sites and IIS 7, on 94,102 sites.

76% on v10

Versions detected: 7
Sites with a version: 1,112,247

Share of sites by version

v10 76% 848,653 v8 13% 150,138 v7 8% 94,102 v6 1% 15,234 v5 <1% 4,023 v99 <1% 50 v4 <1% 47

Live Websites

Websites Using IIS

A sample of live IIS sites from our latest crawl, with the other technologies each one runs.

Open in the Lead List Exporter

Domain	Also runs	Crawl Date
lucer.co	Microsoft ASP.NET Windows Server	September 27, 2026
lovecolumn.co	Windows Server Statcounter	September 27, 2026
lorwolf.com	jQuery HSTS Cloudflare Google Analytics reCAPTCHA	September 27, 2026
lojaskyglasscanela.com.br	jQuery Bootstrap Cloudflare Google Analytics Google Tag Manager	September 27, 2026
lma.co.in	jQuery Bootstrap Microsoft ASP.NET jQuery CDN Windows Server	September 27, 2026
lineexp.com	Windows Server	September 27, 2026
lincerelogios.com.br	jQuery jQuery Migrate Bootstrap Cloudflare Google Analytics	September 27, 2026
linacomercial.com	HSTS Google Analytics reCAPTCHA Microsoft ASP.NET Windows Server	September 27, 2026
lifewave.kr	jQuery Cloudflare Google Tag Manager Swiper Google Hosted Libraries	September 27, 2026
libroline.it	jQuery HTTP/3 jQuery UI Microsoft ASP.NET Windows Server	September 27, 2026

How many websites use IIS?

We found IIS on 1,120,221 websites in our September 2026 crawl, across 217 countries.

Which countries use IIS the most?

By number of websites, the top countries are United States (23%, 258,285 sites), China (13%, 150,412 sites), Italy (10%, 109,423 sites), Turkey (6%, 63,666 sites) and Hong Kong (4%, 49,016 sites). Together they account for 56% of the 1,120,221 IIS sites we track. 33% of the sites are in English, and .com is the most used domain ending, on 50% of them.

Where are IIS websites hosted?

The networks carrying the most IIS sites are Aruba S.p.A. (86,237 sites), Microsoft Corporation (83,870 sites) and Amazon.com, Inc. (58,851 sites).

What technologies are used with IIS?

Across the 1,120,221 IIS sites we track, the technologies most often found alongside it are Windows Server (over 99%, 1,117,884 sites), Microsoft ASP.NET (79%, 881,738 sites), jQuery (64%, 721,997 sites), Bootstrap (31%, 345,334 sites) and Google Analytics (16%, 179,087 sites).

Deep Dive

Breakdown of IIS websites

What else they run, plus their language, hosting network, domain extension and country.

Technology	Sites
Windows Server	1,117,884
Microsoft ASP.NET	881,738
jQuery	721,997
Bootstrap	345,334
Google Analytics	179,087
Plesk	167,033
PHP	161,201
HSTS	137,448
jQuery UI	124,280
jQuery Migrate	93,426
Cloudflare	92,383
Google Hosted Libraries	91,942
OWL Carousel	88,557
cdnjs	88,452
Google Tag Manager	83,785
reCAPTCHA	82,302
MySQL	70,205
WordPress	68,159
Modernizr	68,079
jQuery CDN	67,229
WOW	64,855
jsDelivr	62,378
HTTP/3	62,243
Popper	61,530
Slick	54,904

Language	Sites
English	372,353
Chinese	202,786
Italian	62,540
Turkish	51,084
German	38,711
Spanish	36,618
Portuguese	26,214
French	26,054
Dutch	19,688
Latin	18,220
Czech	17,015
Vietnamese	15,053
Korean	13,194
Japanese	11,510
Danish	11,026
Persian	9,477
Swedish	9,454
Russian	7,462
Tagalog	6,810
Norwegian Nynorsk	5,054
Afrikaans	4,678
Norwegian Bokmål	4,523
Catalan	4,218
Yoruba	4,216
Esperanto	4,074

ASN	Sites
Aruba S.p.A.	86,237
Microsoft Corporation	83,870
Amazon.com, Inc.	58,851
Hangzhou Alibaba Advertising Co.,Ltd.	57,495
IONOS SE	36,026
OVH SAS	21,519
GoDaddy.com, LLC	20,109
Isimtescil Bilisim A.S.	15,843
Alibaba (US) Technology Co., Ltd.	14,292
Cloudie Limited	12,709
Hetzner Online GmbH	12,009
Sharktech	11,066
Cizgi Telekomunikasyon Anonim Sirketi	10,833
CHINA UNICOM China169 Backbone	9,918
Chinanet	8,200
Google LLC	7,836
CYBERCON, INC.	7,674
team.blue Denmark A/S	7,349
INTERNET CZ, a.s.	7,270
Korea Telecom	7,137
Network Solutions, LLC	7,126
Liquid Web, L.L.C	7,120
ASLINE LIMITED	6,940
WHG Hosting Services Ltd	6,925
Tencent Building, Kejizhongyi Avenue	6,776

TLD	Sites
com	555,734
it	65,315
cn	53,598
org	43,727
net	43,646
uk	28,090
br	21,807
cz	17,918
tr	15,068
de	15,033
nl	14,418
in	12,759
dk	12,242
es	9,773
tw	9,336
vn	9,214
kr	8,922
ca	8,911
se	8,889
au	8,872
eu	7,903
fr	7,304
be	6,681
ch	6,251
ru	6,191

Country	Sites
🇺🇸 United States	258,285
🇨🇳 China	150,412
🇮🇹 Italy	109,423
🇹🇷 Turkey	63,666
🇭🇰 Hong Kong	49,016
🇬🇧 United Kingdom	44,627
🇮🇳 India	36,252
🇩🇪 Germany	27,750
🇳🇱 Netherlands	25,997
🇧🇷 Brazil	24,531
🇨🇿 Czech Republic	21,333
🇨🇦 Canada	21,031
🇪🇸 Spain	20,638
🇫🇷 France	19,583
🇻🇳 Vietnam	18,065
🇰🇷 South Korea	17,397
🇩🇰 Denmark	13,641
🇯🇵 Japan	13,474
🇹🇼 Taiwan	12,622
🇦🇺 Australia	11,798
🇸🇪 Sweden	10,793
🇮🇷 Iran	10,650
🇿🇦 South Africa	8,837
🇧🇪 Belgium	7,812
🇷🇺 Russia	7,589