Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

15 hosts · 227 ms

HostCertsFirst seenLast seen
s-l.co.jp 2 2025-10-08 2025-12-01
*.s-l.co.jp 2 2026-09-03 2026-09-03
slremote2.s-l.co.jp 2 2025-07-03 2026-07-21
slremote.s-l.co.jp 1 2026-03-03 2026-03-03
customer.pf.s-l.co.jp 1 2026-02-03 2026-02-03
af-d1.local.s-l.co.jp 1 2026-07-09 2026-07-09
af-p1.local.s-l.co.jp 1 2026-07-09 2026-07-09
af-t1.local.s-l.co.jp 1 2026-07-09 2026-07-09
af-t3.local.s-l.co.jp 1 2026-07-09 2026-07-09
af-m4.local.s-l.co.jp 1 2026-09-29 2026-09-29
go.s-l.co.jp 9 2026-04-19 2026-09-15
devaws-plk-af-ids.s-l.co.jp 3 2026-05-12 2026-07-16
unet.s-l.co.jp 1 2026-05-25 2026-05-25
prev.s-l.co.jp 2 2025-07-22 2026-07-08
www.s-l.co.jp 1 2025-10-08 2025-10-08

Programmatic access: API GET /v1/hosts/s-l.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/s-l.co.jp.