DNS Gurus
Cached · just now
18 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Present
max-age=63072000
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
  • • Add X-Content-Type-Options: nosniff
  • • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
  • • Consider adding Permissions-Policy to control browser features

Performance Headers

3 headers
Connection
Performance
close
Transfer-Encoding
Performance
chunked
Vary
Performance
accept-encoding

Caching Headers

2 headers
Age
Caching
0
Cache-Control
Caching
private, no-cache, no-store, max-age=0, must-revalidate

Content Headers

1 headers
Content-Type
Content
text/html; charset=utf-8

Server Headers

2 headers
Server
Server
cloudflare
X-Powered-By
Server
Next.js

CORS Headers

0 headers
No CORS headers found

Cookies Headers

1 headers
Set-Cookie
Cookies
__cf_bm=3dgQOCSsV1.H6..zguWW.ANR9mM8cvonRUMTgAErCFY-1768809662-1.0.1.1-gCY6kgUlBEl0_X95CvJBmm4KYxkmg6w0q9YwOHTBRTYstTLNBfrzolocj03EzKMaC7QyGAM_r8OJMRIkxi9Q3gyyEQO.0_JObNHCaNL_vL4; path=/; expires=Mon, 19-Jan-26 08:31:02 GMT; domain=.cal.com; HttpOnly; Secure; SameSite=None

Other Headers

8 headers
Cf-Cache-Status
Other
DYNAMIC
Cf-Ray
Other
9c04cd46b876db63-IAD
Date
Other
Mon, 19 Jan 2026 08:01:02 GMT
Link
Other
</_next/static/media/797e433ab948586e-s.p.dbea232f.woff2>; rel=preload; as="font"; crossorigin=""; type="font/woff2", </_next/static/media/CalSans_SemiBold-s.p.83126ede.ttf>; rel=preload; as="font"; crossorigin=""; type="font/ttf", </_next/static/media/CommitMono_400_Italic-s.p.12ddb557.otf>; rel=preload; as="font"; crossorigin=""; type="font/otf", </_next/static/media/CommitMono_400_Regular-s.p.4f54dbf4.otf>; rel=preload; as="font"; crossorigin=""; type="font/otf", </_next/static/media/CommitMono_700_Italic-s.p.b2c9d900.otf>; rel=preload; as="font"; crossorigin=""; type="font/otf", </_next/static/media/CommitMono_700_Regular-s.p.332e278f.otf>; rel=preload; as="font"; crossorigin=""; type="font/otf", </_next/static/media/caa3a2e1cccd8315-s.p.853070df.woff2>; rel=preload; as="font"; crossorigin=""; type="font/woff2", </_next/static/chunks/94bfaa587f259ada.css?dpl=dpl_8USsLqchgee5BcA6yDn1WWk8yRQJ>; rel=preload; as="style", </_next/static/chunks/903522f47fb62f99.css?dpl=dpl_8USsLqchgee5BcA6yDn1WWk8yRQJ>; rel=preload; as="style"
X-Matched-Path
Other
/[domain]
X-Nextjs-Rewritten-Path
Other
/cal/
X-Vercel-Cache
Other
MISS
X-Vercel-Id
Other
iad1:iad1:iad1::iad1::vgf7q-1768809662551-01960756497c

Recommendations

Enable compression (gzip/brotli) to improve performance

Consider removing X-Powered-By header to hide server technology