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.

47 hosts · 454 ms

HostCertsFirst seenLast seenDNS
kalshi.com 16 2025-11-06 2026-09-27 ok
*.kalshi.com 10 2025-10-12 2026-09-11 —
alpha.kalshi.com 4 2026-06-03 2026-10-04 ok
kobra-alpha.kalshi.com 1 2026-09-02 2026-09-02 ok
kobra.kalshi.com 3 2026-06-02 2026-08-03 ok
prod-like.kalshi.com 5 2026-05-25 2026-09-25 ok
aff.kalshi.com 3 2026-07-31 2026-10-03 ok
klearing.kalshi.com 5 2026-05-14 2026-09-17 ok
research.kalshi.com 2 2026-04-22 2026-04-22 ok
growth.kalshi.com 5 2026-05-22 2026-09-25 ok
institutional.kalshi.com 4 2026-04-15 2026-08-18 ok
superset.internal.kalshi.com 1 2025-06-18 2025-06-18 servfail
elinkc19.mail.kalshi.com 8 2026-06-05 2026-10-01 ok
fcm.kalshi.com 5 2026-05-16 2026-09-19 ok
comments-campaign.kalshi.com 4 2026-04-15 2026-08-18 ok
kinetics-admin.kalshi.com 5 2026-06-01 2026-10-02 ok
pro.kalshi.com 3 2026-07-03 2026-09-05 ok
crypto.kalshi.com 5 2026-05-20 2026-09-21 ok
help.kalshi.com 16 2026-04-23 2026-08-19 ok
shop.kalshi.com 3 2026-05-15 2026-09-02 ok
www.shop.kalshi.com 3 2026-05-15 2026-09-02 ok
app.kalshi.com 18 2026-05-09 2026-09-04 ok
rsvp.kalshi.com 3 2026-07-22 2026-09-23 ok
klear.kalshi.com 5 2026-04-25 2026-08-23 nodata
*.klear.kalshi.com 5 2026-04-25 2026-08-23 —
lb.klear.kalshi.com 5 2026-06-01 2026-09-29 ok
api.klear.kalshi.com 5 2026-06-02 2026-09-30 ok
admin.klear.kalshi.com 6 2025-12-04 2026-09-17 ok
*.admin.klear.kalshi.com 1 2025-12-04 2025-12-04 —
kinetics.kalshi.com 2 2026-05-31 2026-05-31 ok
docs.kalshi.com 5 2026-05-12 2026-09-13 ok
forms.kalshi.com 5 2026-04-29 2026-08-27 ok
elections.kalshi.com 4 2025-08-14 2026-07-15 nodata
*.elections.kalshi.com 4 2025-08-14 2026-07-15 —
markets.elections.kalshi.com 5 2026-05-16 2026-09-16 ok
fix.elections.kalshi.com 1 2026-02-02 2026-02-02 ok
*.fix.elections.kalshi.com 1 2026-02-02 2026-02-02 —
*.marketops.kalshi.com 1 2026-04-17 2026-04-17 —
compareperps.kalshi.com 1 2026-08-14 2026-08-14 ok
widgets.kalshi.com 5 2026-05-12 2026-09-13 ok
news.kalshi.com 8 2026-06-05 2026-10-02 ok
act.kalshi.com 5 2026-05-06 2026-09-09 ok
mkt.kalshi.com 5 2026-04-27 2026-08-25 ok
trust.kalshi.com 2 2026-08-10 2026-08-10 ok
www.kalshi.com 5 2026-05-28 2026-09-29 ok
pay.kalshi.com 12 2026-05-11 2026-09-06 ok
verify.kalshi.com 2 2025-07-24 2026-06-24 ok

Programmatic access, with DNS A records: API GET /v1/hosts/kalshi.com (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/kalshi.com.