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.

9 hosts · 328 ms

HostCertsFirst seenLast seenDNS
communication.convivacarecenters.com 3 2025-09-15 2026-09-09 nodata
es-communication.convivacarecenters.com 3 2025-09-15 2026-09-09 nxdomain
smetrics.convivacarecenters.com 7 2025-12-02 2026-09-12 ok
qa-physicians.convivacarecenters.com 4 2026-01-05 2026-08-12 ok
target.convivacarecenters.com 6 2025-07-10 2026-09-12 ok
www.convivacarecenters.com 6 2025-12-02 2026-09-12 ok
qa-www.convivacarecenters.com 9 2026-01-05 2026-10-01 ok
stg-www.convivacarecenters.com 5 2025-12-02 2026-09-12 ok
dev-www.convivacarecenters.com 6 2026-01-05 2026-08-25 ok

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