Domain · Tranco #4,907

kayak.com

kayak.com is ranked #4,907 among the world's most-visited sites (Tranco). It resolves to 151.101.65.29, hosted on Varnish, and presents a TLS certificate issued by Let's Encrypt.

HTTP 301

Tranco rank	#4,907
IPv4	151.101.65.29, 151.101.129.29, 151.101.1.29, 151.101.193.29
IPv6	2a04:4e42:600::285, 2a04:4e42:400::285
Hosting / reverse DNS	Varnish
Nameservers	blue.foundationdns.com, blue.foundationdns.net, blue.foundationdns.org
Mail servers (MX)	mxb-009e5101.gslb.pphosted.com (10), mxa-009e5101.gslb.pphosted.com (10)
HTTP status	301 → https://www.kayak.com/
Web server	Varnish
Detected tech	Varnish
TLS certificate	Let's Encrypt · expires 2026-09-28

Linked company

This domain's name matches a legal entity in our directory:

KAYAK INC.

Notable DNS TXT records

stripe-verification=87f88a3ae169a524f546ed203d0cb22535e7f0e722a5004814cb828d3d1b342f
stripe-verification=a3cd1e5407820ba2f4e9df948ed7871a2303c8488c66b781302677cccd05fde0
stripe-verification=c6ba89f5464c6bfe6ee74b5e0b09d8f67bca1ba9d28ffb7c4d51067344241bbe
teamviewer-sso-verification=f75e9fa8bd764fe28cfd406ac0863d88
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
MS=ms32183003

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FAQ

What is the IP address of kayak.com?

kayak.com resolves to 151.101.65.29, 151.101.129.29, 151.101.1.29 (Varnish).

Who issued the SSL certificate for kayak.com?

The TLS/SSL certificate for kayak.com was issued by Let's Encrypt, valid until 2026-09-28.

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DNS/HTTP/TLS observed 2026-08-06; registration data via RDAP. Informational only. Download JSON · CSV · Browse domains