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.

13 hosts · 320 ms

HostCertsFirst seenLast seenDNS
aweber.com 4 2026-01-15 2026-09-27 ok
*.aweber.com 4 2026-01-15 2026-09-27 —
blog.aweber.com 10 2026-05-07 2026-09-02 ok
ph.aweber.com 16 2026-04-11 2026-10-06 ok
psjoin.aweber.com 16 2026-05-03 2026-08-29 ok
go.aweber.com 5 2026-04-27 2026-08-25 ok
docs.aweber.com 2 2025-10-14 2026-09-14 ok
resources.aweber.com 16 2026-05-03 2026-08-29 ok
templates.aweber.com 5 2026-06-01 2026-09-29 ok
videos.aweber.com 3 2026-05-29 2026-08-05 ok
status.aweber.com 5 2026-04-30 2026-08-27 ok
get.aweber.com 11 2026-05-07 2026-09-02 ok
community.aweber.com 5 2026-05-19 2026-09-16 ok

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