Find every subdomain
of a domain.

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

53 hosts · 256 ms

HostCertsFirst seenLast seen
semrush.com 6 2026-01-21 2026-09-14
*.semrush.com 6 2026-01-21 2026-09-14
blackbox-check-k1.semrush.com 5 2026-06-02 2026-09-19
cdn-company2.semrush.com 3 2026-05-03 2026-08-18
blackbox-check-k3.semrush.com 6 2026-04-17 2026-09-25
wallarm-ingress-kitt-k3.semrush.com 3 2026-05-23 2026-09-08
media.semrush.com 2 2026-04-30 2026-09-30
backend.semrush.com 4 2025-11-13 2026-08-20
*.backend.semrush.com 4 2025-11-13 2026-08-20
engage.semrush.com 12 2026-04-15 2026-10-09
rc-k2-http-challenge.semrush.com 3 2026-05-19 2026-09-06
blackbox-check-k3-http-challenge.semrush.com 3 2026-05-15 2026-08-28
merchandise.semrush.com 3 2026-04-13 2026-05-29
quote.semrush.com 12 2026-04-18 2026-08-14
rp8920cf.semrush.com 5 2026-04-23 2026-08-17
swag.semrush.com 4 2026-05-26 2026-05-26
feedback.reporting.semrush.com 2 2026-05-31 2026-05-31
ai-search.semrush.com 3 2026-04-29 2026-09-29
merch.semrush.com 5 2026-04-14 2026-05-30
oauth.semrush.com 5 2026-04-23 2026-09-30
i.semrush.com 3 2026-05-03 2026-08-20
mi.semrush.com 1 2025-12-21 2025-12-21
api.semrush.com 3 2026-05-21 2026-09-04
grpc-api.semrush.com 4 2026-05-27 2026-09-18
*.grpc-api.semrush.com 4 2026-05-27 2026-09-18
publicapi.semrush.com 4 2026-06-01 2026-09-15
*.publicapi.semrush.com 4 2026-06-01 2026-09-15
bl.publicapi.semrush.com 3 2026-05-18 2026-09-02
feedback.semrush.com 6 2026-04-23 2026-10-01
mail-link.semrush.com 5 2026-04-14 2026-09-22
social.semrush.com 5 2026-05-23 2026-10-08
team.semrush.com 5 2026-04-17 2026-09-30
newsroom.semrush.com 5 2026-04-22 2026-10-05
custom.semrush.com 1 2025-10-07 2025-10-07
*.custom.semrush.com 1 2025-10-07 2025-10-07
newsroom-admin.semrush.com 5 2026-04-22 2026-10-05
go.semrush.com 10 2026-05-06 2026-09-02
mcp.semrush.com 3 2026-05-18 2026-09-05
*.mcp.semrush.com 3 2026-05-18 2026-09-05
lp.semrush.com 6 2026-05-06 2026-09-01
help.semrush.com 5 2026-04-20 2026-10-02
oauth-balancer.semrush.com 4 2026-04-24 2026-10-08
render.semrush.com 6 2026-07-27 2026-09-27
developer.semrush.com 3 2026-05-21 2026-09-09
analytics.semrush.com 3 2026-05-26 2026-09-10
smt-webhooks.semrush.com 5 2026-04-21 2026-09-29
rc.network-tokens.semrush.com 3 2026-05-23 2026-09-08
careers.semrush.com 3 2026-05-11 2026-08-30
salesloft.semrush.com 5 2026-05-31 2026-09-28
ai-visibility-index.semrush.com 6 2025-10-28 2026-08-28
www.ai-visibility-index.semrush.com 1 2025-10-28 2025-10-28
academy.semrush.com 4 2026-04-29 2026-09-29
enterprise-academy.semrush.com 3 2026-04-29 2026-09-29

Programmatic access: API GET /v1/hosts/semrush.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/semrush.com.