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.

18 hosts · 305 ms

HostCertsFirst seenLast seen
atlaspetcompany.com 22 2026-04-22 2026-09-22
*.atlaspetcompany.com 9 2026-04-22 2026-09-13
ssc.atlaspetcompany.com 4 2026-08-30 2026-08-30
i.atlaspetcompany.com 3 2026-05-13 2026-09-04
capi.atlaspetcompany.com 2 2025-11-20 2025-11-20
*.capi.atlaspetcompany.com 1 2025-11-20 2025-11-20
2a57j78f25vjhkbn1glwpqyvevze1cu.capi.atlaspetcompany.com 1 2025-11-20 2025-11-20
trk.atlaspetcompany.com 6 2026-06-17 2026-08-15
returns.atlaspetcompany.com 12 2026-04-12 2026-10-07
repairs.atlaspetcompany.com 8 2026-06-03 2026-08-02
assets.atlaspetcompany.com 13 2026-06-05 2026-10-01
account.atlaspetcompany.com 15 2026-04-16 2026-09-28
www.atlaspetcompany.com 12 2026-05-16 2026-09-12
inbox.atlaspetcompany.com 6 2026-07-24 2026-09-22
agent-inbox.atlaspetcompany.com 2 2026-07-24 2026-07-24
*.agent-inbox.atlaspetcompany.com 2 2026-07-24 2026-07-24
*.inbox.atlaspetcompany.com 6 2026-07-24 2026-09-22
pay.atlaspetcompany.com 14 2026-05-11 2026-09-06

Programmatic access: API GET /v1/hosts/atlaspetcompany.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/atlaspetcompany.com.