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.

39 hosts · 381 ms

HostCertsFirst seenLast seenDNS
esrtech.com 21 2025-07-23 2026-08-24 ok
*.esrtech.com 4 2025-07-23 2026-06-23 —
dev888.esrtech.com 3 2026-06-07 2026-08-09 ok
ca.esrtech.com 13 2026-05-11 2026-09-20 ok
email.mg.esrtech.com 5 2026-05-21 2026-09-18 ok
click.esrtech.com 10 2026-06-11 2026-10-05 ok
uk.esrtech.com 13 2026-05-05 2026-09-12 ok
in.esrtech.com 15 2026-04-17 2026-09-29 ok
sso.esrtech.com 2 2026-06-09 2026-06-09 ok
dev-vip.esrtech.com 4 2026-04-12 2026-09-13 ok
jp.esrtech.com 13 2026-04-11 2026-09-24 ok
cfjump.esrtech.com 4 2026-04-20 2026-08-24 ok
faq-app-de-uat.esrtech.com 6 2026-05-17 2026-09-20 ok
vip-app-jp-uat.esrtech.com 4 2026-04-12 2026-08-16 ok
faq-app-jp-uat.esrtech.com 4 2026-04-12 2026-08-16 ok
vip-app-uat.esrtech.com 5 2026-05-31 2026-10-04 ok
faq-app-uat.esrtech.com 5 2026-05-31 2026-10-04 ok
vip-app-eu-uat.esrtech.com 3 2026-06-07 2026-08-09 ok
faq-app-eu-uat.esrtech.com 4 2026-04-12 2026-08-16 ok
recruit.esrtech.com 2 2026-05-29 2026-05-29 nxdomain
account.esrtech.com 11 2026-04-28 2026-09-07 ok
uk-account.esrtech.com 14 2026-05-07 2026-09-18 ok
in-account.esrtech.com 11 2026-04-16 2026-09-30 ok
eu-account.esrtech.com 17 2026-05-25 2026-10-04 ok
vip-app-ca-test.esrtech.com 5 2026-04-26 2026-08-30 ok
vip-app-uk-test.esrtech.com 5 2026-05-10 2026-09-13 ok
vip-app-jp-test.esrtech.com 4 2026-04-12 2026-08-16 ok
faq-app-jp-test.esrtech.com 4 2026-04-19 2026-08-23 ok
vip-app-test.esrtech.com 3 2026-06-07 2026-08-09 ok
faq-app-test.esrtech.com 5 2026-05-24 2026-09-27 ok
vip-app-au-test.esrtech.com 5 2026-04-26 2026-08-30 ok
faq-app-au-test.esrtech.com 5 2026-05-17 2026-09-20 ok
vip-app-eu-test.esrtech.com 5 2026-05-03 2026-09-06 ok
faq-app-eu-test.esrtech.com 3 2026-06-07 2026-08-09 ok
vip-app-tw-test.esrtech.com 1 2026-08-21 2026-08-21 ok
au.esrtech.com 7 2026-04-18 2026-08-26 ok
eu.esrtech.com 9 2026-04-21 2026-08-29 ok
tw.esrtech.com 5 2026-05-15 2026-09-10 ok
www.esrtech.com 14 2026-04-13 2026-08-22 ok

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