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.

45 hosts · 380 ms

HostCertsFirst seenLast seenDNS
comparethemarket.com 19 2025-08-20 2026-10-06 ok
*.comparethemarket.com 19 2025-08-20 2026-10-06 —
a5fe0.comparethemarket.com 15 2026-04-28 2026-09-29 ok
broadband.comparethemarket.com 6 2026-04-23 2026-08-26 ok
car-refinance.comparethemarket.com 1 2026-07-22 2026-07-22 ok
life.comparethemarket.com 3 2025-09-23 2026-08-24 ok
preprod-life.comparethemarket.com 2 2026-03-09 2026-04-15 nxdomain
engage.comparethemarket.com 10 2026-06-06 2026-10-02 ok
health.comparethemarket.com 1 2025-12-21 2025-12-21 ok
pmi.comparethemarket.com 3 2025-09-24 2026-08-25 ok
api.comparethemarket.com 2 2025-07-20 2026-06-20 ok
mta-sts.email.comparethemarket.com 1 2025-06-16 2025-06-16 nxdomain
mta-sts.eml.comparethemarket.com 1 2025-06-16 2025-06-16 nxdomain
mta-sts.em.comparethemarket.com 1 2025-06-16 2025-06-16 nxdomain
income-protection.comparethemarket.com 1 2025-12-21 2025-12-21 ok
comparison.comparethemarket.com 2 2026-04-29 2026-09-29 ok
acv-lookup.comparethemarket.com 2 2025-07-15 2026-06-15 ok
motservicerepair.comparethemarket.com 5 2026-04-28 2026-08-31 ok
over50s.comparethemarket.com 1 2025-12-21 2025-12-21 ok
rewards.comparethemarket.com 5 2026-05-12 2026-09-04 ok
email-rewards.comparethemarket.com 3 2026-06-23 2026-08-17 ok
mta-sts.email-rewards.comparethemarket.com 2 2026-04-15 2026-09-15 ok
*.rewards.comparethemarket.com 18 2026-04-12 2026-10-06 —
www.rewards.comparethemarket.com 5 2026-05-12 2026-09-04 ok
dataservices.comparethemarket.com 2 2025-06-16 2026-05-17 ok
comparemortgages.comparethemarket.com 1 2026-04-01 2026-04-01 ok
mobilephones.comparethemarket.com 6 2026-04-23 2026-08-26 ok
mta-sts.emails.comparethemarket.com 2 2025-07-17 2026-06-17 ok
alternative-loans.comparethemarket.com 1 2026-07-22 2026-07-22 ok
assets.comparethemarket.com 2 2026-04-12 2026-09-12 ok
businesspayments.comparethemarket.com 2 2026-05-13 2026-05-13 nxdomain
events.comparethemarket.com 2 2025-08-26 2026-07-27 ok
current-accounts.comparethemarket.com 2 2026-04-30 2026-09-30 ok
mta-sts.comparethemarket.com 2 2026-03-25 2026-08-25 ok
over-fiftys.comparethemarket.com 2 2026-04-11 2026-09-11 ok
aiassistant.comparethemarket.com 1 2026-01-19 2026-01-19 ok
content.comparethemarket.com 3 2026-05-01 2026-10-01 ok
asu.comparethemarket.com 2 2025-07-19 2026-06-19 ok
www.comparethemarket.com 16 2026-04-13 2026-08-10 ok
energy.comparethemarket.com 1 2025-12-14 2025-12-14 ok
*.energy.comparethemarket.com 20 2026-04-12 2026-10-06 —
preprod.energy.comparethemarket.com 1 2025-11-09 2025-11-09 ok
*.preprod.energy.comparethemarket.com 20 2026-04-12 2026-10-06 —
api.preprod.energy.comparethemarket.com 1 2025-11-09 2025-11-09 ok
api.energy.comparethemarket.com 1 2025-12-14 2025-12-14 ok

Programmatic access, with DNS A records: API GET /v1/hosts/comparethemarket.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/comparethemarket.com.