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.

27 hosts · 392 ms

HostCertsFirst seenLast seenDNS
mondaymerch.com 32 2026-04-23 2026-10-06 ok
*.mondaymerch.com 24 2026-04-23 2026-10-06 —
tech-lead.mondaymerch.com 3 2026-09-01 2026-09-01 ok
*.tech-lead.mondaymerch.com 3 2026-09-01 2026-09-01 —
headscale.mondaymerch.com 14 2026-06-19 2026-08-25 ok
www.frankfurtersparkasse.mondaymerch.com 15 2026-05-02 2026-09-12 ok
staging.mondaymerch.com 10 2026-04-23 2026-08-19 ok
*.staging.mondaymerch.com 8 2026-04-23 2026-08-19 —
bimi.mondaymerch.com 2 2026-08-25 2026-08-25 ok
api.mondaymerch.com 12 2026-04-25 2026-08-21 ok
eql.mondaymerch.com 5 2026-05-24 2026-09-21 ok
load.eql.mondaymerch.com 11 2026-05-21 2026-09-17 ok
dev-platform.mondaymerch.com 8 2026-04-23 2026-08-19 ok
*.dev-platform.mondaymerch.com 8 2026-04-23 2026-08-19 —
cdn.mondaymerch.com 5 2026-05-25 2026-09-22 ok
shop-origin.mondaymerch.com 1 2026-08-25 2026-08-25 ok
shop.mondaymerch.com 5 2026-04-22 2026-08-26 ok
staging-hetzner.mondaymerch.com 10 2026-06-10 2026-10-06 nxdomain
*.staging-hetzner.mondaymerch.com 10 2026-06-10 2026-10-06 —
newsletter.mondaymerch.com 5 2026-06-02 2026-09-29 ok
products.mondaymerch.com 5 2026-05-15 2026-09-18 ok
staging.products.mondaymerch.com 1 2026-04-17 2026-04-17 nxdomain
review-packets.mondaymerch.com 6 2026-06-19 2026-08-17 ok
automated-insights.mondaymerch.com 4 2026-04-18 2026-08-16 ok
framer-asset.mondaymerch.com 10 2026-08-03 2026-10-01 ok
trust.mondaymerch.com 3 2025-09-08 2026-08-09 ok
www.mondaymerch.com 26 2026-04-19 2026-10-07 ok

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