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.

48 hosts · 336 ms

HostCertsFirst seenLast seenDNS
sompo.io 3 2026-05-01 2026-08-16 ok
browser-sdl.stg.casa.sompo.io 3 2026-04-15 2026-09-15 ok
browser-group-partners.stg.casa.sompo.io 3 2026-04-15 2026-09-15 ok
browser-sdl.casa.sompo.io 3 2026-04-17 2026-09-17 ok
browser-group-partners.casa.sompo.io 2 2026-04-17 2026-09-17 ok
dev.casa.sompo.io 1 2026-02-17 2026-02-17 nodata
browser-sdl.dev.casa.sompo.io 2 2026-02-17 2026-02-17 ok
browser-group-partners.dev.casa.sompo.io 2 2026-02-17 2026-02-17 ok
phrv-doc.sompo.io 1 2025-11-19 2025-11-19 nodata
*.phrv-doc.sompo.io 1 2025-11-19 2025-11-19 —
manande.sompo.io 1 2026-01-05 2026-01-05 ok
elb.manande.sompo.io 1 2026-01-05 2026-01-05 ok
webadmin-elb.manande.sompo.io 2 2026-05-04 2026-10-04 ok
stg.webadmin-elb.manande.sompo.io 3 2026-04-26 2026-09-26 ok
dev.webadmin-elb.manande.sompo.io 2 2026-04-22 2026-09-22 ok
webuser-elb.manande.sompo.io 2 2025-07-03 2026-06-03 ok
stg.webuser-elb.manande.sompo.io 2 2025-06-30 2026-05-31 ok
dev.webuser-elb.manande.sompo.io 2 2025-06-09 2026-05-10 ok
stg.elb.manande.sompo.io 1 2026-01-05 2026-01-05 ok
dev.elb.manande.sompo.io 1 2025-12-28 2025-12-28 ok
stg.manande.sompo.io 1 2026-01-05 2026-01-05 ok
dev.manande.sompo.io 1 2025-12-28 2025-12-28 ok
sb01rdg.sompo.io 2 2026-04-25 2026-09-25 ok
sb02rdg.sompo.io 2 2025-07-08 2026-06-08 ok
sb03rdg.sompo.io 1 2026-02-17 2026-02-17 nodata
sb99rdg.sompo.io 3 2025-09-28 2026-08-28 ok
tech.sompo.io 7 2025-12-03 2026-09-05 ok
conceptbook.sompo.io 3 2026-05-02 2026-08-18 ok
miraicare-portal.sompo.io 5 2026-06-01 2026-09-27 ok
stg.miraicare-portal.sompo.io 2 2026-09-17 2026-09-18 ok
api.stg.miraicare-portal.sompo.io 1 2026-09-16 2026-09-16 ok
api.miraicare-portal.sompo.io 4 2026-06-02 2026-09-17 ok
lp.miraicare-portal.sompo.io 2 2026-07-13 2026-09-04 ok
dev.miraicare-portal.sompo.io 4 2026-06-01 2026-09-23 ok
api.dev.miraicare-portal.sompo.io 3 2026-06-01 2026-09-15 ok
designsystem.sompo.io 3 2026-05-23 2026-09-06 ok
sb01dsm.sompo.io 1 2025-12-20 2025-12-20 ok
sb99dsm.sompo.io 1 2025-12-13 2025-12-13 ok
sb01sso.sompo.io 1 2026-04-25 2026-04-25 nxdomain
sb02sso.sompo.io 1 2026-05-06 2026-05-06 nxdomain
sb03sso.sompo.io 1 2026-01-07 2026-01-07 nxdomain
sb04sso.sompo.io 1 2026-01-30 2026-01-30 nxdomain
sb99sso.sompo.io 3 2025-09-28 2026-08-28 ok
kasaigis.sompo.io 1 2025-12-18 2025-12-18 ok
mta-sts.sompo.io 2 2026-06-12 2026-08-22 ok
api.phrv-dev.sompo.io 1 2025-11-12 2025-11-12 nodata
admin-api.phrv-dev.sompo.io 1 2025-11-12 2025-11-12 nodata
joy.sompo.io 2 2026-03-04 2026-08-04 ok

Programmatic access, with DNS A records: API GET /v1/hosts/sompo.io (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/sompo.io.