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.

54 hosts · 383 ms

HostCertsFirst seenLast seenDNS
simmonsfirm.com 10 2026-02-08 2026-08-16 ok
*.simmonsfirm.com 2 2026-02-08 2026-04-07 —
manageengine-01.simmonsfirm.com 3 2025-11-12 2026-09-24 ok
www.manageengine-01.simmonsfirm.com 3 2025-11-12 2026-09-24 nxdomain
mesothelioma.simmonsfirm.com 2 2026-09-17 2026-09-17 ok
exhybrid.simmonsfirm.com 7 2025-10-01 2026-09-29 ok
aapud.simmonsfirm.com 10 2026-05-06 2026-09-01 ok
duovd.simmonsfirm.com 8 2026-05-06 2026-09-01 ok
pulse.simmonsfirm.com 5 2026-05-12 2026-09-14 ok
clientchatlive.simmonsfirm.com 6 2026-01-25 2026-09-24 ok
www.clientchatlive.simmonsfirm.com 6 2026-01-25 2026-09-24 nxdomain
medreviewstaging.simmonsfirm.com 3 2026-06-07 2026-08-07 ok
utuuh.simmonsfirm.com 8 2026-05-06 2026-09-01 ok
ai.simmonsfirm.com 7 2026-05-03 2026-08-25 ok
mail.simmonsfirm.com 8 2025-10-01 2026-10-01 ok
www.mail.simmonsfirm.com 8 2025-10-01 2026-10-01 nxdomain
securemail.simmonsfirm.com 1 2026-02-02 2026-02-02 ok
www.securemail.simmonsfirm.com 1 2026-02-02 2026-02-02 nxdomain
zmdcm.simmonsfirm.com 2 2026-09-18 2026-09-18 ok
litellm.simmonsfirm.com 7 2026-05-02 2026-08-25 ok
mesolawfirm.simmonsfirm.com 10 2026-04-18 2026-08-14 ok
kpjfo.simmonsfirm.com 10 2026-05-07 2026-09-02 ok
meso.simmonsfirm.com 11 2026-05-20 2026-09-16 ok
fciuo.simmonsfirm.com 3 2026-09-18 2026-09-18 ok
simmonsapp.simmonsfirm.com 1 2025-09-01 2025-09-01 ok
*.simmonsapp.simmonsfirm.com 1 2025-09-01 2025-09-01 —
sftp.simmonsfirm.com 4 2026-01-12 2026-09-24 ok
www.sftp.simmonsfirm.com 4 2026-01-12 2026-09-24 nxdomain
autodiscover.simmonsfirm.com 7 2025-10-01 2026-09-29 ok
mesolawyer.simmonsfirm.com 3 2026-09-17 2026-09-17 ok
es.simmonsfirm.com 10 2026-06-07 2026-10-04 ok
services.simmonsfirm.com 3 2025-11-04 2026-01-07 ok
www.services.simmonsfirm.com 3 2025-11-04 2026-01-07 nxdomain
adfs.simmonsfirm.com 2 2025-07-23 2025-08-20 ok
www.adfs.simmonsfirm.com 2 2025-07-23 2025-08-20 nxdomain
referrals.simmonsfirm.com 6 2026-06-01 2026-10-04 ok
forms.simmonsfirm.com 5 2026-05-29 2026-09-26 ok
cognos.simmonsfirm.com 6 2026-01-31 2026-09-23 ok
www.cognos.simmonsfirm.com 6 2026-01-31 2026-09-23 ok
smithers.simmonsfirm.com 3 2025-09-22 2026-07-24 ok
www.smithers.simmonsfirm.com 3 2025-09-22 2026-07-24 ok
mesolawsuits.simmonsfirm.com 2 2026-10-06 2026-10-06 ok
surveys.simmonsfirm.com 10 2026-05-11 2026-09-06 ok
smithers-uat.simmonsfirm.com 2 2025-12-01 2026-01-21 ok
www.smithers-uat.simmonsfirm.com 2 2025-12-01 2026-01-21 ok
iconect.simmonsfirm.com 2 2026-01-03 2026-02-17 ok
www.iconect.simmonsfirm.com 2 2026-01-03 2026-02-17 nxdomain
mesolawsuit.simmonsfirm.com 2 2026-10-06 2026-10-06 ok
aigpu.simmonsfirm.com 8 2026-04-15 2026-08-25 ok
litellmgpu.simmonsfirm.com 8 2026-04-16 2026-08-25 ok
mesolaw.simmonsfirm.com 8 2026-05-21 2026-09-16 ok
medreview.simmonsfirm.com 3 2026-06-09 2026-08-08 ok
www.simmonsfirm.com 11 2026-04-19 2026-08-15 ok
gzlsz.simmonsfirm.com 10 2026-04-16 2026-08-13 ok

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