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.

9 hosts · 227 ms

HostCertsFirst seenLast seen
nelke.co.jp 6 2025-08-29 2026-09-15
*.nelke.co.jp 4 2026-04-14 2026-09-15
nelkeha.nelke.co.jp 2 2025-08-29 2026-07-08
title.nelke.co.jp 1 2026-10-03 2026-10-03
stg.title.nelke.co.jp 1 2026-10-03 2026-10-03
admin-stg.title.nelke.co.jp 1 2026-10-03 2026-10-03
admin.title.nelke.co.jp 1 2026-10-03 2026-10-03
membership.nelke.co.jp 1 2026-05-26 2026-05-26
www.nelke.co.jp 2 2025-08-29 2026-07-08

Programmatic access: API GET /v1/hosts/nelke.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/nelke.co.jp.