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.

65 hosts · 390 ms

HostCertsFirst seenLast seenDNS
kast.xyz 88 2026-04-11 2026-09-22 ok
*.kast.xyz 16 2026-05-12 2026-09-07 —
web.kast.xyz 12 2026-05-05 2026-08-31 ok
webd.kast.xyz 2 2026-04-08 2026-04-08 nxdomain
leaderboardd.kast.xyz 14 2026-05-16 2026-09-11 nxdomain
concierged.kast.xyz 13 2026-06-05 2026-10-01 ok
appd.kast.xyz 14 2026-04-10 2026-10-04 ok
leaderboard.kast.xyz 6 2026-05-18 2026-09-13 nxdomain
businessd.kast.xyz 2 2026-05-08 2026-05-08 nxdomain
concierge.kast.xyz 13 2026-04-16 2026-09-22 ok
affiliate.kast.xyz 10 2026-04-20 2026-08-16 ok
88eab265c72bb.remote.kast.xyz 5 2026-10-05 2026-10-05 ok
affiliated.remote.kast.xyz 8 2026-04-19 2026-08-15 ok
admind.remote.kast.xyz 8 2026-04-16 2026-08-12 ok
adminp.remote.kast.xyz 12 2026-04-30 2026-08-26 ok
dapp.remote.kast.xyz 22 2026-04-11 2026-08-08 ok
affiliateq.remote.kast.xyz 4 2026-05-15 2026-07-13 nxdomain
adminq.remote.kast.xyz 6 2026-04-26 2026-06-24 nxdomain
affiliates.remote.kast.xyz 8 2026-04-19 2026-08-16 ok
admins.remote.kast.xyz 10 2026-05-01 2026-08-27 ok
affiliateu.remote.kast.xyz 8 2026-04-19 2026-08-15 ok
adminu.remote.kast.xyz 8 2026-04-24 2026-08-21 ok
appstg.kast.xyz 1 2026-04-28 2026-04-28 nxdomain
8lldizt4xsbxbhh8hr5vyw80818573m.appstg.kast.xyz 1 2026-04-28 2026-04-28 nxdomain
url8509.mail.kast.xyz 8 2026-05-06 2026-09-01 ok
claim.kast.xyz 30 2026-05-19 2026-10-01 ok
join.kast.xyz 2 2026-06-11 2026-09-02 ok
go.kast.xyz 10 2026-05-02 2026-08-31 ok
app.kast.xyz 13 2026-05-05 2026-10-04 ok
vzcfo1bukbuolxhm1g2dhf7yn0rirx9.app.kast.xyz 2 2026-05-05 2026-10-04 nodata
webq.kast.xyz 2 2026-04-08 2026-04-08 nxdomain
appq.kast.xyz 4 2026-04-10 2026-06-08 nxdomain
businessq.kast.xyz 2 2026-05-08 2026-05-08 nxdomain
currency-converter.kast.xyz 3 2026-08-18 2026-09-22 ok
docs.kast.xyz 17 2026-05-19 2026-10-01 ok
www.docs.kast.xyz 20 2026-05-19 2026-10-01 ok
leaderboards.kast.xyz 6 2026-05-16 2026-09-11 nxdomain
affiliates.kast.xyz 15 2026-05-19 2026-10-01 ok
clicks.kast.xyz 15 2026-05-24 2026-09-19 ok
cms.kast.xyz 4 2026-09-18 2026-09-18 ok
*.cms.kast.xyz 2 2026-09-18 2026-09-18 —
apps.kast.xyz 6 2026-04-14 2026-08-10 ok
careers.kast.xyz 7 2026-06-16 2026-09-24 ok
appd.business.kast.xyz 12 2026-05-14 2026-09-09 ok
app.business.kast.xyz 7 2026-07-08 2026-09-06 ok
apps.business.kast.xyz 8 2026-05-14 2026-09-09 ok
appu.business.kast.xyz 6 2026-05-14 2026-09-09 ok
businesss.kast.xyz 2 2026-05-08 2026-05-08 nxdomain
support.kast.xyz 15 2026-04-13 2026-10-01 ok
webu.kast.xyz 2 2026-04-08 2026-04-08 nxdomain
leaderboardu.kast.xyz 6 2026-05-16 2026-09-11 nxdomain
appu.kast.xyz 15 2026-04-10 2026-10-04 ok
businessu.kast.xyz 2 2026-05-08 2026-05-08 nxdomain
web-dev.kast.xyz 4 2026-08-14 2026-08-14 ok
*.web-dev.kast.xyz 2 2026-08-14 2026-08-14 —
web.dev.kast.xyz 4 2026-09-09 2026-09-09 ok
*.web.dev.kast.xyz 2 2026-09-09 2026-09-09 —
cms.dev.kast.xyz 4 2026-08-20 2026-08-20 ok
*.cms.dev.kast.xyz 2 2026-08-20 2026-08-20 —
web.preview.kast.xyz 4 2026-09-08 2026-09-08 ok
*.web.preview.kast.xyz 2 2026-09-08 2026-09-08 —
www.kast.xyz 11 2026-05-30 2026-09-22 ok
*.www.kast.xyz 2 2026-09-22 2026-09-22 —
verify.kast.xyz 5 2026-06-13 2026-09-22 ok
academy.kast.xyz 6 2026-04-21 2026-09-22 ok

Programmatic access, with DNS A records: API GET /v1/hosts/kast.xyz (API key for paging).

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/kast.xyz.