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.

43 hosts · 389 ms

HostCertsFirst seenLast seenDNS
uswitch.com 7 2025-08-17 2026-09-15 ok
*.uswitch.com 4 2025-08-17 2026-09-15 —
assets0.uswitch.com 7 2025-06-08 2026-09-15 ok
assets1.uswitch.com 7 2025-06-08 2026-09-15 ok
assets2.uswitch.com 7 2025-06-08 2026-09-15 ok
sa.uswitch.com 5 2026-04-25 2026-08-23 ok
refurbished.uswitch.com 12 2026-04-30 2026-09-16 ok
fusion-id.uswitch.com 4 2026-04-10 2026-08-08 ok
life.uswitch.com 5 2026-05-11 2026-09-08 ok
home.uswitch.com 17 2026-04-25 2026-09-03 ok
img.uswitch.com 10 2026-04-24 2026-09-11 ok
tapi-staging.uswitch.com 5 2026-05-18 2026-09-15 ok
switch.uswitch.com 5 2026-05-05 2026-09-02 ok
health.uswitch.com 5 2026-05-11 2026-09-08 ok
mi.uswitch.com 2 2025-08-02 2026-07-01 ok
mobile-app-api.uswitch.com 5 2026-05-18 2026-09-15 ok
tapi.uswitch.com 5 2026-05-18 2026-09-15 ok
saveonenergyuk.uswitch.com 5 2026-05-18 2026-09-15 ok
travel.uswitch.com 5 2026-05-18 2026-09-15 ok
protection.uswitch.com 5 2026-05-11 2026-09-08 ok
income-protection.uswitch.com 5 2026-05-22 2026-09-19 ok
breakdown.uswitch.com 5 2026-05-18 2026-09-15 ok
exp.uswitch.com 4 2026-04-07 2026-08-05 ok
voucher.uswitch.com 4 2026-04-18 2026-08-16 ok
motor.uswitch.com 17 2026-04-19 2026-09-02 ok
labs.uswitch.com 5 2026-04-28 2026-08-26 ok
credit-cards.uswitch.com 5 2026-05-23 2026-09-20 ok
yourrewards.uswitch.com 4 2026-04-09 2026-08-07 ok
ablink.emails.uswitch.com 5 2026-05-18 2026-09-15 ok
loans.uswitch.com 5 2026-05-20 2026-09-17 ok
broadband-uploads.partners.uswitch.com 6 2026-06-02 2026-09-30 ok
energy-uploads.partners.uswitch.com 4 2026-04-14 2026-08-12 ok
fusion-events.uswitch.com 4 2026-04-07 2026-08-05 ok
savings-accounts.uswitch.com 5 2026-04-22 2026-08-20 ok
proteus.uswitch.com 5 2026-05-11 2026-09-08 ok
ablink.contact.uswitch.com 5 2026-05-18 2026-09-15 ok
gadget.uswitch.com 5 2026-05-18 2026-09-15 ok
pet.uswitch.com 5 2026-05-22 2026-09-19 ok
staging.pet.uswitch.com 5 2026-05-22 2026-09-19 nxdomain
insight.uswitch.com 5 2026-05-18 2026-09-15 ok
mobile-app-api-test.uswitch.com 5 2026-05-18 2026-09-15 ok
www.uswitch.com 5 2026-05-18 2026-09-15 ok
business-energy.uswitch.com 5 2026-05-30 2026-09-27 ok

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