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.

65 hosts · 362 ms

HostCertsFirst seenLast seenDNS
a-1chimney.com 10 2026-04-12 2026-09-02 ok
*.a-1chimney.com 5 2026-04-12 2026-09-02 —
ca.a-1chimney.com 1 2026-09-02 2026-09-02 ok
sac.a-1chimney.com 4 2026-05-28 2026-07-27 ok
*.sac.a-1chimney.com 4 2026-05-28 2026-07-27 —
de.a-1chimney.com 4 2026-06-01 2026-07-31 ok
*.de.a-1chimney.com 4 2026-06-01 2026-07-31 —
mke.a-1chimney.com 4 2026-06-01 2026-07-31 ok
*.mke.a-1chimney.com 4 2026-06-01 2026-07-31 —
cle.a-1chimney.com 4 2026-04-14 2026-08-12 ok
*.cle.a-1chimney.com 4 2026-04-14 2026-08-12 —
sf.a-1chimney.com 4 2026-04-20 2026-08-18 ok
*.sf.a-1chimney.com 4 2026-04-20 2026-08-18 —
tech.a-1chimney.com 4 2026-05-27 2026-07-26 ok
*.tech.a-1chimney.com 4 2026-05-27 2026-07-26 —
kci.a-1chimney.com 4 2026-05-17 2026-07-16 ok
*.kci.a-1chimney.com 4 2026-05-17 2026-07-16 —
ri.a-1chimney.com 6 2026-04-19 2026-08-18 ok
*.ri.a-1chimney.com 6 2026-04-19 2026-08-18 —
ok.a-1chimney.com 4 2026-04-19 2026-08-17 ok
*.ok.a-1chimney.com 4 2026-04-19 2026-08-17 —
call.a-1chimney.com 1 2026-08-31 2026-08-31 ok
www.call.a-1chimney.com 1 2026-08-31 2026-08-31 ok
atl.a-1chimney.com 1 2026-09-02 2026-09-02 ok
stl.a-1chimney.com 4 2026-05-20 2026-07-19 ok
*.stl.a-1chimney.com 4 2026-05-20 2026-07-19 —
crm.a-1chimney.com 4 2026-06-02 2026-08-01 ok
*.crm.a-1chimney.com 4 2026-06-02 2026-08-01 —
in.a-1chimney.com 5 2026-04-29 2026-08-27 ok
*.in.a-1chimney.com 5 2026-04-29 2026-08-27 —
mo.a-1chimney.com 4 2026-04-19 2026-08-17 ok
*.mo.a-1chimney.com 4 2026-04-19 2026-08-17 —
gso.a-1chimney.com 4 2026-05-18 2026-07-17 ok
*.gso.a-1chimney.com 4 2026-05-18 2026-07-17 —
app.a-1chimney.com 1 2026-08-11 2026-08-11 ok
or.a-1chimney.com 4 2026-04-19 2026-08-17 ok
*.or.a-1chimney.com 4 2026-04-19 2026-08-17 —
cle-ads.a-1chimney.com 6 2026-05-14 2026-07-14 ok
*.cle-ads.a-1chimney.com 6 2026-05-14 2026-07-14 —
ct-ads.a-1chimney.com 5 2026-04-25 2026-08-23 ok
*.ct-ads.a-1chimney.com 5 2026-04-25 2026-08-23 —
calls.a-1chimney.com 4 2026-04-13 2026-08-11 ok
*.calls.a-1chimney.com 4 2026-04-13 2026-08-11 —
tools.a-1chimney.com 5 2026-04-25 2026-08-23 ok
*.tools.a-1chimney.com 5 2026-04-25 2026-08-23 —
aus.a-1chimney.com 5 2026-05-29 2026-09-02 ok
*.aus.a-1chimney.com 4 2026-05-29 2026-07-28 —
sat.a-1chimney.com 4 2026-05-30 2026-07-29 ok
*.sat.a-1chimney.com 4 2026-05-30 2026-07-29 —
det.a-1chimney.com 7 2026-04-28 2026-08-27 ok
*.det.a-1chimney.com 7 2026-04-28 2026-08-27 —
pit.a-1chimney.com 4 2026-05-26 2026-07-25 ok
*.pit.a-1chimney.com 2 2026-07-25 2026-07-25 —
www.pit.a-1chimney.com 2 2026-05-26 2026-05-26 ok
clt.a-1chimney.com 4 2026-05-19 2026-07-18 ok
*.clt.a-1chimney.com 4 2026-05-19 2026-07-18 —
development.a-1chimney.com 1 2026-08-19 2026-08-19 ok
report.a-1chimney.com 4 2026-04-11 2026-08-14 nxdomain
hou.a-1chimney.com 4 2026-05-29 2026-07-28 ok
*.hou.a-1chimney.com 4 2026-05-29 2026-07-28 —
dfw.a-1chimney.com 4 2026-04-12 2026-08-10 ok
*.dfw.a-1chimney.com 4 2026-04-12 2026-08-10 —
www.a-1chimney.com 2 2026-09-02 2026-09-02 ok
ny.a-1chimney.com 4 2026-05-14 2026-07-13 ok
*.ny.a-1chimney.com 4 2026-05-14 2026-07-13 —

Programmatic access, with DNS A records: API GET /v1/hosts/a-1chimney.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/a-1chimney.com.