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.

52 hosts · 336 ms

HostCertsFirst seenLast seenDNS
instamed.com 14 2026-05-02 2026-09-08 ok
*.instamed.com 14 2026-05-02 2026-09-08 —
GooglePay-PROD-26.instamed.com 1 2025-12-05 2025-12-05 —
GooglePay-PROD.instamed.com 1 2025-09-25 2025-09-25 —
eaa.instamed.com 1 2025-09-26 2025-09-26 ok
sua.instamed.com 2 2026-03-05 2026-07-16 nxdomain
connect-payload.instamed.com 2 2026-03-05 2026-07-16 nxdomain
bd.instamed.com 5 2026-05-17 2026-08-10 ok
Online.instamed.com 2 2025-09-09 2025-09-09 —
online.instamed.com 3 2025-09-29 2026-07-30 ok
private.instamed.com 3 2025-10-29 2026-08-20 ok
site.instamed.com 10 2026-04-28 2026-09-25 ok
connect-payload-staging.instamed.com 2 2026-03-05 2026-07-16 nxdomain
online-staging.instamed.com 3 2025-09-17 2026-07-23 ok
cdn-staging.instamed.com 1 2026-01-06 2026-01-06 ok
InstaMed-DocuSign-staging.instamed.com 3 2025-07-18 2026-06-04 —
Demo-staging.instamed.com 1 2025-12-17 2025-12-17 —
demo-staging.instamed.com 16 2026-05-05 2026-09-01 ok
register-staging.instamed.com 4 2025-07-18 2026-06-24 ok
connect-mtls-staging.instamed.com 1 2026-02-18 2026-02-18 ok
developers-staging.instamed.com 17 2025-12-17 2026-09-01 ok
connect-staging.instamed.com 4 2026-02-24 2026-07-08 ok
www-staging.instamed.com 13 2025-12-17 2026-08-31 ok
pay-staging.instamed.com 5 2025-09-09 2026-07-13 ok
InstaMed-DigitalSigning.instamed.com 1 2026-05-04 2026-05-04 —
cdn.instamed.com 1 2026-01-06 2026-01-06 ok
InstaMed-DocuSign.instamed.com 2 2025-07-18 2026-06-04 —
demo.instamed.com 1 2025-12-17 2025-12-17 ok
help.instamed.com 10 2025-09-09 2026-08-25 ok
sso-placeholder.instamed.com 1 2026-01-29 2026-01-29 nxdomain
register.instamed.com 4 2025-07-18 2026-06-25 ok
Autodiscover.instamed.com 4 2025-09-15 2026-07-30 —
connect-mtls.instamed.com 1 2026-02-18 2026-02-18 ok
Developers.instamed.com 1 2025-12-17 2025-12-17 —
InstaMed-DocuSign-uat.instamed.com 3 2025-07-18 2026-05-29 —
connect.instamed.com 4 2026-02-24 2026-07-08 ok
Demo-maint.instamed.com 1 2025-12-17 2025-12-17 —
demo-maint.instamed.com 16 2026-05-05 2026-09-01 ok
Developers-maint.instamed.com 1 2025-12-17 2025-12-17 —
developers-maint.instamed.com 14 2026-05-05 2026-09-01 ok
www-maint.instamed.com 11 2025-12-17 2026-09-01 ok
private-test.instamed.com 2 2025-07-22 2026-06-04 nxdomain
InstaMed-DigitalSigning-test.instamed.com 2 2026-05-04 2026-09-21 —
identity-test.instamed.com 4 2025-11-04 2026-09-16 nxdomain
Demo-dev.instamed.com 1 2025-12-17 2025-12-17 —
demo-dev.instamed.com 14 2026-05-05 2026-09-01 ok
Developers-dev.instamed.com 1 2025-12-17 2025-12-17 —
developers-dev.instamed.com 14 2026-05-05 2026-09-01 ok
www-dev.instamed.com 15 2025-12-17 2026-09-01 ok
www.instamed.com 2 2025-10-23 2025-12-17 ok
pay.instamed.com 4 2025-09-09 2026-07-13 ok
identity.instamed.com 2 2025-11-04 2026-09-17 nxdomain

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