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.

47 hosts · 307 ms

HostCertsFirst seenLast seen
claude.com 43 2026-04-12 2026-09-30
*.claude.com 20 2026-05-30 2026-09-30
a.claude.com 2 2026-08-25 2026-08-25
partnerhub.claude.com 2 2026-08-17 2026-08-17
code.claude.com 20 2026-04-29 2026-08-25
console.claude.com 20 2026-04-12 2026-10-07
website.claude.com 18 2026-05-28 2026-09-23
staging.claude.com 14 2026-05-17 2026-07-23
content-cdn-staging.claude.com 6 2026-09-20 2026-09-22
*.content-cdn-staging.claude.com 2 2026-09-22 2026-09-22
programs-staging.claude.com 2 2026-09-23 2026-09-23
assets-staging.claude.com 9 2026-08-05 2026-10-03
auth.claude.com 2 2026-09-29 2026-09-29
links.email.claude.com 14 2026-05-17 2026-09-12
platform.claude.com 19 2026-04-27 2026-09-20
content-cdn.claude.com 7 2026-09-20 2026-09-22
*.content-cdn.claude.com 2 2026-09-22 2026-09-22
websitemain.claude.com 13 2026-05-25 2026-09-20
admin.claude.com 4 2026-09-01 2026-09-01
habanero.claude.com 2 2026-10-07 2026-10-07
microsoft365.mcp.claude.com 3 2026-05-05 2026-08-21
pubmed.mcp.claude.com 16 2026-05-25 2026-09-21
plaid.mcp.claude.com 2 2026-08-21 2026-08-21
stripe-link.mcp.claude.com 2 2026-09-09 2026-09-09
gcal.mcp.claude.com 1 2026-05-15 2026-05-15
slack-channel.mcp.claude.com 2 2026-05-05 2026-06-27
gmail.mcp.claude.com 1 2026-05-16 2026-05-16
ehr.mcp.claude.com 2 2026-10-08 2026-10-08
hcls.mcp.claude.com 20 2026-05-23 2026-09-18
econ-index.mcp.claude.com 12 2026-06-10 2026-10-06
fedramp.claude.com 3 2026-09-21 2026-09-21
auth.fedramp.claude.com 3 2026-09-21 2026-09-21
auth-admin.fedramp.claude.com 3 2026-09-21 2026-09-21
docs.claude.com 15 2026-04-21 2026-09-13
downloads.claude.com 3 2026-05-26 2026-09-08
releases.claude.com 10 2026-08-04 2026-10-02
url6377.updates.claude.com 20 2026-05-17 2026-09-12
assets.claude.com 10 2026-08-06 2026-10-04
status.claude.com 5 2026-05-18 2026-08-14
support.claude.com 10 2026-06-05 2026-10-01
l10n-review.claude.com 2 2026-09-17 2026-09-17
preview.claude.com 23 2026-04-24 2026-09-12
downloads.preview.claude.com 3 2026-05-22 2026-09-11
www.claude.com 10 2026-05-23 2026-09-18
privacy.claude.com 13 2026-06-06 2026-10-02
academy.claude.com 12 2026-05-01 2026-08-27
eap-academy.claude.com 10 2026-07-01 2026-08-30

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