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.

13 hosts · 316 ms

HostCertsFirst seenLast seenDNS
pewresearch.org 5 2026-05-09 2026-09-10 ok
alpha.pewresearch.org 5 2026-05-01 2026-09-02 ok
beta.pewresearch.org 6 2026-04-30 2026-09-01 ok
platform.pewresearch.org 5 2026-05-02 2026-09-02 ok
services.pewresearch.org 5 2026-04-23 2026-08-25 ok
assets.pewresearch.org 2 2025-07-11 2026-06-10 ok
charts.pewresearch.org 5 2026-04-22 2026-08-24 ok
status.pewresearch.org 5 2026-05-17 2026-09-19 ok
tollbit.pewresearch.org 14 2026-04-29 2026-09-19 ok
account.pewresearch.org 5 2026-05-19 2026-09-11 ok
www.pewresearch.org 5 2026-05-09 2026-09-10 ok
legacy.pewresearch.org 4 2026-04-29 2026-06-30 ok
canary.pewresearch.org 3 2026-07-02 2026-09-02 ok

Programmatic access, with DNS A records: API GET /v1/hosts/pewresearch.org (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/pewresearch.org.