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.

100 hosts (first page) · 284 ms

HostCertsFirst seenLast seen
expressvpn.com 3 2025-09-13 2026-08-14
be-okta.expressvpn.com 2 2026-04-27 2026-09-27
backend.expressvpn.com 2 2026-04-27 2026-09-27
frontend.expressvpn.com 2 2026-04-27 2026-09-27
vpn-control-plane.expressvpn.com 2 2025-08-12 2026-07-13
store.expressvpn.com 11 2026-04-15 2026-09-26
enterprise.expressvpn.com 2 2025-08-06 2026-09-08
blog.expressvpn.com 1 2026-04-29 2026-04-29
www.blog.expressvpn.com 1 2026-04-29 2026-04-29
auth.expressvpn.com 2 2026-04-06 2026-09-06
billing.api.expressvpn.com 2 2026-04-27 2026-09-27
affiliates.api.expressvpn.com 2 2026-04-27 2026-09-27
connectivitycheck.expressvpn.com 1 2026-01-21 2026-01-21
*.connectivitycheck.expressvpn.com 1 2026-01-21 2026-01-21
internal.expressvpn.com 2 2025-07-10 2026-06-10
portal.expressvpn.com 1108 2026-04-13 2026-10-10
billing-portal.expressvpn.com 17 2025-06-23 2025-10-06
*.portal.expressvpn.com 8 2026-05-23 2026-09-18
staging-pr-1000.portal.expressvpn.com 2 2026-04-27 2026-04-27
*.staging-pr-1000.portal.expressvpn.com 2 2026-04-27 2026-04-27
staging-pr-400.portal.expressvpn.com 2 2026-05-21 2026-05-21
*.staging-pr-400.portal.expressvpn.com 2 2026-05-21 2026-05-21
staging-pr-410.portal.expressvpn.com 2 2026-05-22 2026-05-22
*.staging-pr-410.portal.expressvpn.com 2 2026-05-22 2026-05-22
staging-pr-710.portal.expressvpn.com 12 2026-05-24 2026-09-19
*.staging-pr-710.portal.expressvpn.com 2 2026-08-10 2026-08-10
staging-pr-20.portal.expressvpn.com 8 2026-04-18 2026-08-14
staging-pr-420.portal.expressvpn.com 2 2026-05-25 2026-05-25
*.staging-pr-420.portal.expressvpn.com 2 2026-05-25 2026-05-25
staging-pr-720.portal.expressvpn.com 2 2026-08-12 2026-08-12
*.staging-pr-720.portal.expressvpn.com 2 2026-08-12 2026-08-12
staging-pr-430.portal.expressvpn.com 2 2026-05-27 2026-05-27
*.staging-pr-430.portal.expressvpn.com 2 2026-05-27 2026-05-27
staging-pr-630.portal.expressvpn.com 4 2026-07-10 2026-07-10
*.staging-pr-630.portal.expressvpn.com 4 2026-07-10 2026-07-10
staging-pr-730.portal.expressvpn.com 10 2026-05-26 2026-09-21
staging-pr-640.portal.expressvpn.com 2 2026-07-16 2026-07-16
*.staging-pr-640.portal.expressvpn.com 2 2026-07-16 2026-07-16
staging-pr-740.portal.expressvpn.com 8 2026-05-31 2026-09-26
staging-pr-840.portal.expressvpn.com 2 2026-09-17 2026-09-17
*.staging-pr-840.portal.expressvpn.com 2 2026-09-17 2026-09-17
staging-pr-660.portal.expressvpn.com 2 2026-07-22 2026-07-22
*.staging-pr-660.portal.expressvpn.com 2 2026-07-22 2026-07-22
staging-pr-960.portal.expressvpn.com 8 2026-05-15 2026-09-10
staging-pr-370.portal.expressvpn.com 2 2026-05-13 2026-05-13
*.staging-pr-370.portal.expressvpn.com 2 2026-05-13 2026-05-13
staging-pr-470.portal.expressvpn.com 2 2026-06-05 2026-06-05
*.staging-pr-470.portal.expressvpn.com 2 2026-06-05 2026-06-05
staging-pr-670.portal.expressvpn.com 2 2026-07-29 2026-07-29
*.staging-pr-670.portal.expressvpn.com 2 2026-07-29 2026-07-29
staging-pr-770.portal.expressvpn.com 2 2026-08-27 2026-08-27
*.staging-pr-770.portal.expressvpn.com 2 2026-08-27 2026-08-27
staging-pr-680.portal.expressvpn.com 2 2026-07-31 2026-07-31
*.staging-pr-680.portal.expressvpn.com 2 2026-07-31 2026-07-31
staging-pr-490.portal.expressvpn.com 2 2026-06-11 2026-06-11
*.staging-pr-490.portal.expressvpn.com 2 2026-06-11 2026-06-11
staging-pr-790.portal.expressvpn.com 12 2026-06-02 2026-09-28
staging-pr-711.portal.expressvpn.com 2 2026-08-12 2026-08-12
*.staging-pr-711.portal.expressvpn.com 2 2026-08-12 2026-08-12
staging-pr-811.portal.expressvpn.com 6 2026-06-03 2026-09-29
staging-pr-911.portal.expressvpn.com 6 2026-04-27 2026-08-23
staging-pr-821.portal.expressvpn.com 9 2026-06-05 2026-10-01
*.staging-pr-821.portal.expressvpn.com 2 2026-09-11 2026-09-11
staging-pr-741.portal.expressvpn.com 2 2026-08-18 2026-08-18
*.staging-pr-741.portal.expressvpn.com 2 2026-08-18 2026-08-18
staging-pr-451.portal.expressvpn.com 2 2026-06-02 2026-06-02
*.staging-pr-451.portal.expressvpn.com 2 2026-06-02 2026-06-02
staging-pr-461.portal.expressvpn.com 2 2026-06-03 2026-06-03
*.staging-pr-461.portal.expressvpn.com 2 2026-06-03 2026-06-03
staging-pr-661.portal.expressvpn.com 10 2026-05-21 2026-09-16
*.staging-pr-661.portal.expressvpn.com 2 2026-07-24 2026-07-24
staging-pr-861.portal.expressvpn.com 14 2026-04-13 2026-10-08
staging-pr-961.portal.expressvpn.com 8 2026-05-16 2026-09-11
staging-pr-471.portal.expressvpn.com 2 2026-06-05 2026-06-05
*.staging-pr-471.portal.expressvpn.com 2 2026-06-05 2026-06-05
staging-pr-671.portal.expressvpn.com 6 2026-05-19 2026-09-14
staging-pr-181.portal.expressvpn.com 2 2026-04-23 2026-04-23
*.staging-pr-181.portal.expressvpn.com 2 2026-04-23 2026-04-23
staging-pr-391.portal.expressvpn.com 2 2026-05-19 2026-05-19
*.staging-pr-391.portal.expressvpn.com 2 2026-05-19 2026-05-19
staging-pr-491.portal.expressvpn.com 2 2026-06-11 2026-06-11
*.staging-pr-491.portal.expressvpn.com 2 2026-06-11 2026-06-11
staging-pr-791.portal.expressvpn.com 8 2026-06-02 2026-09-28
staging-pr-891.portal.expressvpn.com 4 2026-10-01 2026-10-01
*.staging-pr-891.portal.expressvpn.com 4 2026-10-01 2026-10-01
staging-pr-732-2.portal.expressvpn.com 10 2026-05-26 2026-09-21
staging-pr-502.portal.expressvpn.com 2 2026-06-12 2026-06-12
*.staging-pr-502.portal.expressvpn.com 2 2026-06-12 2026-06-12
staging-pr-702.portal.expressvpn.com 2 2026-08-07 2026-08-07
*.staging-pr-702.portal.expressvpn.com 2 2026-08-07 2026-08-07
staging-pr-902.portal.expressvpn.com 8 2026-04-26 2026-08-22
staging-pr-712.portal.expressvpn.com 10 2026-05-24 2026-09-19
staging-pr-812.portal.expressvpn.com 12 2026-06-04 2026-09-30
staging-pr-522.portal.expressvpn.com 4 2026-06-16 2026-06-16
*.staging-pr-522.portal.expressvpn.com 4 2026-06-16 2026-06-16
staging-pr-722.portal.expressvpn.com 10 2026-06-02 2026-09-28
staging-pr-822.portal.expressvpn.com 2 2026-09-11 2026-09-11
*.staging-pr-822.portal.expressvpn.com 2 2026-09-11 2026-09-11
staging-pr-432.portal.expressvpn.com 2 2026-05-27 2026-05-27
*.staging-pr-432.portal.expressvpn.com 2 2026-05-27 2026-05-27

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/expressvpn.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/expressvpn.com.