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.

36 hosts · 220 ms

HostCertsFirst seenLast seenDNS
pskcwa01.promise.co.jp 1 2026-04-20 2026-04-20 ok
interlb1.promise.co.jp 1 2026-05-19 2026-05-19 nxdomain
tskcwas1.promise.co.jp 1 2026-02-06 2026-02-06 ok
pskcwa02.promise.co.jp 1 2026-04-20 2026-04-20 ok
interlb2.promise.co.jp 1 2026-01-29 2026-01-29 nxdomain
tskcwas2.promise.co.jp 1 2026-02-09 2026-02-09 ok
interlb2ts2.promise.co.jp 1 2026-01-29 2026-01-29 nxdomain
cyberts2.promise.co.jp 2 2026-01-29 2026-01-29 ok
pskcwa03.promise.co.jp 1 2026-04-20 2026-04-20 ok
tskcwas3.promise.co.jp 1 2026-02-09 2026-02-09 ok
interlb2ts3.promise.co.jp 1 2026-01-29 2026-01-29 nxdomain
cyberts3.promise.co.jp 3 2025-07-17 2026-05-18 ok
cyberts4.promise.co.jp 2 2026-01-29 2026-01-29 ok
qa.promise.co.jp 3 2025-12-31 2026-04-23 ok
interlb1stg.promise.co.jp 1 2026-05-19 2026-05-19 nxdomain
interlb2stg.promise.co.jp 1 2026-01-29 2026-01-29 nxdomain
apistg.promise.co.jp 6 2025-07-17 2026-06-09 ok
cyberstg.promise.co.jp 5 2026-04-08 2026-06-09 ok
api.promise.co.jp 4 2025-07-17 2026-05-26 ok
syusyo.promise.co.jp 2 2026-01-23 2026-01-23 ok
cyber.promise.co.jp 3 2026-05-15 2026-05-26 ok
locations.promise.co.jp 8 2026-05-10 2026-09-06 ok
p-chat-ts.promise.co.jp 1 2025-11-26 2025-11-26 ok
new-p-chat-ts.promise.co.jp 2 2026-07-14 2026-07-14 ok
interlb2ts.promise.co.jp 1 2026-01-29 2026-01-29 nxdomain
cyberts.promise.co.jp 1 2026-05-15 2026-05-15 ok
cloud.contactts.promise.co.jp 1 2026-05-22 2026-05-22 ok
image.contactts.promise.co.jp 4 2025-07-12 2026-09-01 ok
click.contactts.promise.co.jp 1 2026-05-22 2026-05-22 ok
view.contactts.promise.co.jp 2 2025-07-06 2026-06-23 ok
p-chat.promise.co.jp 1 2025-11-26 2025-11-26 ok
cloud.contact.promise.co.jp 1 2026-05-22 2026-05-22 ok
image.contact.promise.co.jp 4 2025-07-12 2026-09-01 ok
click.contact.promise.co.jp 1 2026-05-23 2026-05-23 ok
view.contact.promise.co.jp 2 2025-07-06 2026-06-24 ok
pentry.promise.co.jp 3 2026-05-12 2026-08-28 ok

Programmatic access, with DNS A records: API GET /v1/hosts/promise.co.jp (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/promise.co.jp.