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 · 307 ms

HostCertsFirst seenLast seen
copa.com 15 2026-04-25 2026-10-08
api-wifi.copa.com 23 2026-04-29 2026-10-08
www.api-wifi.copa.com 9 2026-04-29 2026-05-12
api.copa.com 4 2025-12-30 2026-05-19
s-api.copa.com 4 2025-10-27 2026-09-28
developer.copa.com 2 2025-12-30 2025-12-30
api-uat.copa.com 1 2025-10-27 2025-10-27
s-api-uat.copa.com 16 2025-11-12 2026-10-08
developer-uat.copa.com 1 2025-10-27 2025-10-27
s-developer-uat.copa.com 1 2025-11-12 2025-11-12
s-api-east.copa.com 4 2025-10-27 2026-09-28
s-api-west.copa.com 4 2025-10-27 2026-09-28
www.copa.com 14 2026-04-25 2026-10-08
my.copa.com 23 2026-04-20 2026-10-03
*.my.copa.com 15 2026-06-07 2026-10-03

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