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.

11 hosts · 264 ms

HostCertsFirst seenLast seen
pa.cityfootball.com 1 2026-06-02 2026-06-02
www.pa.cityfootball.com 1 2026-06-02 2026-06-02
melpa.cityfootball.com 1 2026-06-18 2026-06-18
www.melpa.cityfootball.com 1 2026-06-18 2026-06-18
pitchside.cityfootball.com 3 2025-10-12 2026-09-12
barclaysapi.cityfootball.com 1 2026-06-19 2026-06-19
www.barclaysapi.cityfootball.com 1 2026-06-19 2026-06-19
peopleservices.cityfootball.com 5 2026-05-23 2026-09-20
insights.cityfootball.com 1 2026-07-15 2026-07-15
www.insights.cityfootball.com 1 2026-07-15 2026-07-15
support.cityfootball.com 5 2026-05-27 2026-09-24

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