X-Clacks-Overhead is a non-standard HTTP header used to transmit tribute messages within server responses.

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Companies

501

Top Country

US

Top Industry

Health Care

Adoption Insights

X-Clacks-Overhead is used by 501 companies in our database, representing approximately 0.02% of all tracked websites. The most common industry using X-Clacks-Overhead is Health Care, and adoption is strongest in US.

Top Countries Using X-Clacks-Overhead

US219 companies
GB133 companies
DE50 companies
NO17 companies
FR13 companies
CZ11 companies
TH8 companies
AU7 companies
IE6 companies
CH5 companies

Top Industries Using X-Clacks-Overhead

Health Care47 companies
Consulting27 companies
Information Technology20 companies
Education17 companies
Events16 companies
Music14 companies
E-Commerce14 companies
Media and Entertainment12 companies
Communities12 companies
Audio Recording and Production11 companies

Companies Using X-Clacks-Overhead

CompanyDomain
AgDevCoagdevco.com
Luzmoluzmo.com
YonedaLabsyonedalabs.com
Virtuagymvirtuagym.com
Canonicalcanonical.com
Axonautaxonaut.com
Salient Biosalient.bio
Foundries.iofoundries.io
Zzoommzzoomm.com
Billiebillie.io

How We Detect X-Clacks-Overhead

The Web Radar detects X-Clacks-Overhead by analyzing HTTP headers, JavaScript variables, HTML source code, cookies, and DNS records across 3M+ websites. Our detection engine uses over 10,000+ pattern rules to ensure accurate identification. Browse all technologies →

Frequently Asked Questions

What is X-Clacks-Overhead?+

X-Clacks-Overhead is a non-standard HTTP header used to transmit tribute messages within server responses.

How many companies use X-Clacks-Overhead?+

501 companies in our database use X-Clacks-Overhead, representing approximately 0.02% of all tracked websites.

What industries use X-Clacks-Overhead the most?+

The top industries using X-Clacks-Overhead are Health Care, Consulting, Information Technology.

What countries use X-Clacks-Overhead the most?+

The top countries using X-Clacks-Overhead are US, GB, DE.

Is X-Clacks-Overhead popular?+

X-Clacks-Overhead is used by 501 companies, making it a notable Miscellaneous technology based on adoption across our tracked websites.

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Data last updated: June 2026