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.

21 hosts · 277 ms

HostCertsFirst seenLast seenDNS
belo.app 31 2026-04-18 2026-08-16 ok
*.belo.app 18 2026-02-07 2026-08-25 —
api-stg.belo.app 2 2025-07-14 2026-06-14 ok
*.stg.belo.app 7 2025-09-17 2026-07-01 —
kyc.stg.belo.app 2 2026-08-13 2026-08-13 ok
link.stg.belo.app 2 2026-08-14 2026-08-14 ok
assets.stg.belo.app 2 2026-08-14 2026-08-14 ok
pay.stg.belo.app 2 2026-08-18 2026-08-18 nxdomain
runners-hook.belo.app 2 2026-08-27 2026-08-27 ok
work.belo.app 11 2026-04-18 2026-10-02 ok
*.internal.belo.app 1 2025-11-16 2025-11-16 —
travel.belo.app 6 2026-05-28 2026-08-31 ok
email.mail.belo.app 5 2026-05-11 2026-09-08 ok
requerimientos.belo.app 4 2026-05-05 2026-07-06 ok
reports.belo.app 2 2026-08-25 2026-08-25 nodata
ar-plus.belo.app 4 2026-04-11 2026-08-09 ok
br-plus.belo.app 4 2026-06-06 2026-10-04 ok
www.br-plus.belo.app 4 2026-04-11 2026-08-09 ok
split.belo.app 13 2026-05-18 2026-09-14 ok
www.belo.app 29 2026-04-24 2026-08-22 ok
bind-proxy.belo.app 4 2026-04-10 2026-09-08 ok

Programmatic access, with DNS A records: API GET /v1/hosts/belo.app (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/belo.app.