kayak.com 200 🔒 SSL Valid
Checked: just now 🔗 Visit site
HTTP Status ?A three-digit code showing if the site loaded successfully (200), redirects (301/302), or has errors (4xx/5xx).Read more →
200
SSL Expires ?When the SSL certificate expires. An expired certificate causes browser security warnings.Read more →
in 39d
Domain Expires ?When the domain registration expires. If not renewed, the domain becomes available to others.Read more →
in 255d
Hosting ?The company and location where this website's server is physically located.Read more →
Fastly
Security ?Score based on key HTTP security headers: HSTS, Content-Security-Policy, and X-Frame-Options.Read more →
1/3
IP Address ?The numerical address of the server hosting this website. Reveals location, provider, and network.Read more →
151.101.1.29
🛠️ Tech Stack ?Technologies detected on this website: CMS, frameworks, libraries, CDN, and analytics tools. 4
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📊 Analytics
Google Analytics Google Tag Manager
⚡ Cache
Varnish
⚡ JS Framework
React
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🌐 DNS Records ?DNS translates domain names to IP addresses. Records control where the site, email, and services are directed.Read more →
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A (IPv4)151.101.193.29151.101.1.29151.101.65.29151.101.129.29
AAAA (IPv6)2a04:4e42::2852a04:4e42:400::2852a04:4e42:600::2852a04:4e42:200::285
NSblue.foundationdns.orgblue.foundationdns.comblue.foundationdns.net
MX10 mxa-009e5101.gslb.pphosted.com10 mxb-009e5101.gslb.pphosted.com
TXT
v=spf1 include:_spf.psm.knowbe4.com include:mail.zendesk.com include:_spf.presscloud.com include:helpscoutemail.com include:kayak.com._nspf.vali.email include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all
onetrust-domain-verification=1d14495f61ec44ddb84c7e861332306b
stripe-verification=a3cd1e5407820ba2f4e9df948ed7871a2303c8488c66b781302677cccd05fde0
meltwater_sso_20220613_TRITON-9222
stripe-verification=7ce9b2bea1ac18f9f8081a240f771d3d36e6177de24d42e48b3c8f7fd5b0ba47
linear-domain-verification=5h25z4iybzed
atlassian-domain-verification=B1e9uqeJyMnx/b8qh19lhS2HmbMwe7iMsn3YJUdW1FrMfjT5ZIZIApoe6mckiqGv
smartsheet-site-validation=VnoFFHldpjUduBdwSfSrHI1U3dlbsp4P
stripe-verification=36a8ae673d2824b08508d33f51fbd183a78e598178cf455b3941b48b1ed1848c
adobe-idp-site-verification=e3698045df155e7f8cf3b02c00c51c334c988ed32d2c35abf118b5455559d0fb
onetrust-domain-verification=5785b70b49c94d87b375b04a26cb9a99
google-site-verification=atbvv5AjB8MGJiGm0kJQicx405wRnH3IXkvhmevhlWs
google-site-verification=hR-vohAQxRsRyvUskvHc58Ebvc4yVW7FXc7pyRzIdz4
jamf-site-verification=0aiX3pBSM2fa-OoV_DbSDg
loom-site-verification=cf88c3547adb422198e2effdcbc1822c
docusign=b94148f1-8103-446e-be3c-c780204b2b73
docusign=401274e0-a81e-4f1e-9379-3d0cb24b0646
google-site-verification=w24oU5jGpVa8SU1Tznbo4CU8_m_WL6o-yDo0gosSBKY
notion-domain-verification=ulKLX952hySY2ToVspcw3nuYFf7ANxdT5aOZR2JpUby
google-site-verification=7Swb0dHV4cMeHcGWVdFuKZYVA6rhwGfDU0scbwz22-c
stripe-verification=6fc06b28a4dce12135cfc982ee67b4f50ecdf24931633f46ed324b939e2d132c
docker-verification=38689d18-8405-471e-8c40-0f79329477db
google-site-verification=RkXPYTo0sfAReK2PL4rFLzDvF69y68je5By3mbLYtTI
_globalsign-domain-verification=p1fktqCHnOA1sE262wg61RlM1M1TddxeBhTTQfKOf-
openai-domain-verification=08273489
google-site-verification=Ne2Q3MQtiFamXAbgdT27mGRHEP1uH6u0S3hxE8oEIUg
MS=ms32183003
stripe-verification=87f88a3ae169a524f546ed203d0cb22535e7f0e722a5004814cb828d3d1b342f
anthropic-domain-verification-ssadh3=5QlR12RKrK6yot7p3HMOdRp65
atlassian-sending-domain-verification=ee4a120b-7262-4e68-b208-f80801824d31
docusign=32480aaa-d033-46e8-8295-f0a0a1a7a5dc
stripe-verification=0541ddd99d259a6b83784688d152e53689b3c7b62ab2a94c1af4881d8c325667
cisco-ci-domain-verification=20500cc295a110d0573b2bdc2093ab09b58730d8f8b963895b6a3133a368cb25
teamviewer-sso-verification=f75e9fa8bd764fe28cfd406ac0863d88
docusign=d717820e-c9d2-4c7f-8673-c52c7533107e
onetrust-domain-verification=91fa27999c43422991e04989039fab48
stripe-verification=c6ba89f5464c6bfe6ee74b5e0b09d8f67bca1ba9d28ffb7c4d51067344241bbe
mgverify=19b8eb35bd233256b9c7b140bd3739975015fc9e05f760bf919fe5999bd01f0f
airtable-verification=ab2905fae08cc438965f22077ffe0917
google-site-verification=EMk53mZVKZzMKDvuxN7Izz5SrGePcS6YL9UU-O5p3Cw
cursor-domain-verification-eerey1=DeRjeVboCFaoJnWyaHOvbIMSV
openai-domain-verification=dv-d02WfHAbY79UMiEztHNqRWoE
stripe-verification=6bb69f06400ffd81c173e80ece77f9cb903fd23583d37619628834425c8e0335
google-site-verification=U_6jqgvCpjeeNLZEUNq4kW-yF4KXPrcUUifhpyjlJyQ
apple-domain-verification=y2Igt0Wg-UHV70fp8FwwAY0lXT7yuhgjH7LQCBWWn3k
📋 WHOIS / RDAP ?Public registration data: who registered the domain, when, and when it expires.Read more →
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Registrar101domain GRS Limited
Registered1995-04-13
Expires2027-05-02 (in 255 days)
Last Updated2025-01-31
Statusclient delete prohibitedclient transfer prohibitedserver delete prohibitedserver transfer prohibitedserver update prohibited
🔒 SSL Certificate ?Encrypts the connection between browsers and this website. Valid SSL = HTTPS works.Read more → Valid
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Subject (CN)kayak.com
IssuerLet's Encrypt
Valid From2026-06-30
Valid Until2026-09-28 (39 days left)
SANs (1)kayak.com
📡 HTTP Headers ?Metadata sent by the server: reveals software, caching rules, and security configuration.Read more →
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Status200
ServerKAYAK/1.0
Content-Typetext/html;charset=UTF-8
Final URLhttps://www.kayak.com/
content-security-policyupgrade-insecure-requests; frame-ancestors 'self'
x-content-type-optionsnosniff
referrer-policyorigin-when-cross-origin
cache-controlprivate, no-store
x-cacheMISS, MISS
via1.1 varnish
Security headers ?HTTP headers that protect visitors from attacks. HSTS forces HTTPS, CSP controls resource loading, X-Frame-Options prevents clickjacking.Read more →
HSTS
Content-Security-Policy
X-Frame-Options
🏠 Hosting ?Physical infrastructure: where the server is, who operates it, and what network it belongs to.Read more →
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IP Address151.101.1.29
ProviderFastly
OrganizationFastly, Inc.
ASNAS54113
CountryUS
CitySan Francisco
🛡️ Security Score C (4/7)
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Valid SSL
HSTS
CSP
X-Frame-Options
X-Content-Type
Referrer-Policy
Permissions-Policy
🗺️ Sitemap & Robots
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robots.txt Found Open
Sitemap Found 107 sitemaps (index) pages
Last modified 2026-08-19T02:22:56-04:00
🔗 Social & Meta Tags Complete
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TitleSearch Flights, Hotels & Rental Cars | KAYAK
DescriptionKAYAK searches hundreds of other travel sites at once to find the information you need to make the right decisions on flights, hotels & rental cars.
OG TitleSearch Flights, Hotels & Rental Cars | KAYAK
OG DescriptionKAYAK searches hundreds of other travel sites at once to find the information you need to make the right decisions on flights, hotels & rental cars.
OG Imagehttps://content.r9cdn.net/rimg/provider-logos/common/socialmedia/kayak-logo.png?width=1200&height=630&crop=false
OG preview
OG Typearticle
OG Site NameKAYAK
Twitter Cardsummary_large_image
Canonical URLhttps://www.kayak.com
Languageen-us
📧 Mail Security ?Email authentication records (SPF & DMARC) that prevent spoofing and phishing from this domain.Read more →
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SPF✓ Present
v=spf1 include:_spf.psm.knowbe4.com include:mail.zendesk.com include:_spf.presscloud.com include:helpscoutemail.com include:kayak.com._nspf.vali.email include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all
DMARC✓ Present
v=DMARC1; p=reject; pct=100; adkim=r; aspf=r; rua=mailto:[email protected]
MX Records
10 → mxa-009e5101.gslb.pphosted.com
10 → mxb-009e5101.gslb.pphosted.com