Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

100 hosts (first page) · 461 ms

HostCertsFirst seenLast seenDNS
kayak.com 19 2026-05-01 2026-09-14 ok
*.kayak.com 21 2026-03-10 2026-09-14 —
x1.kayak.com 2 2025-07-08 2026-07-14 ok
c4.x1.kayak.com 2 2025-07-08 2026-07-14 ok
c5.x1.kayak.com 2 2025-07-08 2026-07-14 ok
i4.kayak.com 2 2025-07-23 2026-07-30 ok
p4.kayak.com 2 2025-07-23 2026-07-30 ok
x4.kayak.com 2 2025-07-08 2026-07-14 ok
i5.kayak.com 2 2025-07-23 2026-07-30 ok
p5.kayak.com 2 2025-07-23 2026-07-30 ok
x5.kayak.com 2 2025-07-08 2026-07-14 ok
p6.kayak.com 2 2025-07-23 2026-07-30 ok
ca.kayak.com 5 2026-05-01 2026-08-29 ok
www.fr.ca.kayak.com 4 2026-06-07 2026-10-05 ok
business.ca.kayak.com 5 2026-05-01 2026-08-29 ok
www.ca.kayak.com 5 2026-05-01 2026-08-29 ok
agoda.kayak.com 5 2026-05-01 2026-08-29 ok
www.ua.kayak.com 5 2026-05-01 2026-08-29 ok
za.kayak.com 5 2026-05-01 2026-08-29 ok
www.za.kayak.com 5 2026-05-01 2026-08-29 ok
cc.kayak.com 7 2025-07-08 2026-09-29 ok
nomad.kayak.com 5 2026-05-01 2026-08-29 ok
www.fr.be.kayak.com 4 2026-06-07 2026-10-05 ok
www.be.kayak.com 5 2026-05-01 2026-08-29 ok
inside.kayak.com 20 2026-05-18 2026-09-13 ok
manage.kayak.com 5 2026-05-01 2026-08-29 ok
1pass-scim-bridge.kayak.com 3 2025-09-09 2026-08-09 ok
www.he.kayak.com 4 2026-04-13 2026-08-11 ok
console.kayak.com 12 2026-04-27 2026-08-23 ok
*.console.kayak.com 12 2026-04-27 2026-08-23 —
p4console.kayak.com 10 2026-05-16 2026-09-11 ok
p5console.kayak.com 14 2026-05-17 2026-09-12 ok
solflare.kayak.com 1 2026-08-14 2026-08-14 ok
nextdeparture.kayak.com 5 2026-05-01 2026-08-29 ok
*.affiliate.kayak.com 5 2026-05-25 2026-09-22 —
ng.kayak.com 5 2026-05-01 2026-08-29 ok
www.ng.kayak.com 5 2026-05-01 2026-08-29 ok
ami.staging.kayak.com 14 2025-09-09 2026-09-11 ok
signupapi.staging.kayak.com 2 2025-09-09 2026-08-10 nodata
booking.kayak.com 5 2026-05-01 2026-08-29 ok
business-booking.kayak.com 5 2026-05-01 2026-08-29 ok
kibana-tracegraph-zrh.kayak.com 22 2026-04-23 2026-09-11 ok
kibana-marvel-zrh.kayak.com 12 2026-04-23 2026-08-19 ok
kibana-zoom-zrh.kayak.com 26 2026-04-23 2026-09-13 ok
kibana-geo-zrh.kayak.com 24 2026-04-23 2026-09-11 ok
kibana-provider-zrh.kayak.com 32 2026-04-23 2026-09-13 ok
kibana-docker-zrh.kayak.com 28 2026-04-23 2026-09-14 ok
kibana-r9logs-zrh.kayak.com 27 2026-04-23 2026-09-13 ok
kibana-wordpress-zrh.kayak.com 22 2026-04-23 2026-09-11 ok
kibana-review-zrh.kayak.com 32 2026-04-23 2026-09-12 ok
kibana-destiny-zrh.kayak.com 22 2026-04-23 2026-09-11 ok
p5sentry002.zrh.kayak.com 2 2025-08-06 2026-08-10 nodata
kibana.marvel.zrh.kayak.com 14 2026-06-01 2026-09-27 ok
fi.kayak.com 5 2026-05-01 2026-08-29 ok
www.fi.kayak.com 5 2026-05-01 2026-08-29 ok
sli.kayak.com 3 2025-10-13 2026-09-13 nodata
ami.kayak.com 18 2025-07-14 2026-07-15 nodata
awsami.kayak.com 2 2025-07-14 2026-06-14 nodata
api.kayak.com 5 2026-04-22 2026-08-19 ok
p4sentry-api.kayak.com 5 2026-05-18 2026-09-15 ok
p5sentry-api.kayak.com 5 2026-05-18 2026-09-15 ok
kiwi.kayak.com 4 2026-04-17 2026-08-15 ok
track.kayak.com 5 2026-04-26 2026-08-24 ok
link.kayak.com 7 2026-01-14 2026-09-19 ok
mightyapetravel.kayak.com 4 2026-04-15 2026-08-13 ok
kogantravel.kayak.com 5 2026-05-18 2026-09-15 ok
il.kayak.com 5 2026-05-01 2026-08-29 ok
www.il.kayak.com 5 2026-05-01 2026-08-29 ok
espanol.kayak.com 5 2026-05-01 2026-08-29 ok
travel-finn-no.uwl.kayak.com 5 2026-05-30 2026-09-27 ok
kibana-tracegraph-som.kayak.com 26 2026-04-23 2026-09-12 ok
kibana-marvel-som.kayak.com 28 2026-04-23 2026-09-11 ok
kibana-zoom-som.kayak.com 28 2026-04-23 2026-09-12 ok
kibana-cdn-som.kayak.com 26 2026-04-23 2026-09-12 ok
kibana-geo-som.kayak.com 24 2026-04-23 2026-09-13 ok
kibana-provider-som.kayak.com 26 2026-04-23 2026-09-12 ok
kibana-docker-som.kayak.com 22 2026-04-23 2026-09-11 ok
kibana-r9logs-som.kayak.com 28 2026-04-23 2026-09-13 ok
kibana-review-som.kayak.com 24 2026-04-23 2026-09-11 ok
kibana-destiny-som.kayak.com 26 2026-04-23 2026-09-12 ok
p4sentry002.som.kayak.com 2 2025-08-06 2026-08-10 nodata
cn.kayak.com 5 2026-05-01 2026-08-29 ok
www.cn.kayak.com 5 2026-05-01 2026-08-29 ok
vn.kayak.com 5 2026-05-01 2026-08-29 ok
www.vn.kayak.com 5 2026-05-01 2026-08-29 ok
www.ro.kayak.com 5 2026-05-01 2026-08-29 ok
agodaapp.kayak.com 5 2026-05-01 2026-08-29 ok
wp.kayak.com 13 2026-06-06 2026-10-02 nodata
*.wp.kayak.com 25 2026-05-16 2026-10-02 —
partner.kayak.com 5 2026-05-01 2026-08-29 ok
gr.kayak.com 5 2026-05-01 2026-08-29 ok
www.gr.kayak.com 5 2026-05-01 2026-08-29 ok
es.kayak.com 5 2026-05-01 2026-08-29 ok
www.es.kayak.com 5 2026-05-01 2026-08-29 ok
earnextramiles.kayak.com 5 2026-05-05 2026-09-02 ok
cruises.kayak.com 17 2026-05-25 2026-10-04 ok
api.cruises.kayak.com 10 2026-05-24 2026-09-20 ok
affiliates.kayak.com 2 2025-07-29 2026-06-29 ok
api.affiliates.kayak.com 2 2025-07-29 2026-06-29 nodata
signupapi.affiliates.kayak.com 2 2025-07-29 2026-06-29 nodata

Showing the first 100 hostnames — sign in with GitHub or Google to page the full list, or use the API with an API key: GET /v1/hosts/kayak.com.

Shown here: hostnames with a certificate that is valid now or expired within the last 90 days. The full history since 2013 — hostnames whose last certificate expired earlier — is a Pro plan method: GET /v1/hosts-history/kayak.com.