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.

100 hosts (first page) · 248 ms

HostCertsFirst seenLast seen
halifax.co.uk 13 2025-06-26 2026-09-21
check2.halifax.co.uk 3 2025-07-17 2026-07-09
static.halifax.co.uk 2 2025-07-04 2026-06-15
financial-advice.halifax.co.uk 6 2025-07-25 2026-08-06
carfinance.halifax.co.uk 1 2025-11-07 2025-11-07
tracking.emails.carfinance.halifax.co.uk 4 2026-06-07 2026-10-03
mycarfinance.halifax.co.uk 4 2025-11-10 2026-09-09
test.mycarfinance.halifax.co.uk 9 2025-06-12 2026-10-08
www.mycarfinance.halifax.co.uk 4 2025-11-10 2026-09-09
home-insurance.halifax.co.uk 1 2026-05-29 2026-05-29
prehome-insurance.halifax.co.uk 5 2025-07-01 2026-06-16
homeinsurance.halifax.co.uk 6 2026-01-19 2026-09-04
pre-homeinsurance.halifax.co.uk 10 2026-01-06 2026-09-11
businessinsurance.halifax.co.uk 2 2025-12-12 2026-05-08
mymortgage.halifax.co.uk 2 2025-07-17 2026-07-12
pre.halifax.co.uk 1 2026-01-20 2026-01-20
static.pre.halifax.co.uk 1 2026-01-20 2026-01-20
images.pre.halifax.co.uk 1 2026-01-20 2026-01-20
www.pre.halifax.co.uk 1 2026-01-20 2026-01-20
home-quote.halifax.co.uk 6 2025-11-10 2026-09-04
pre-home-quote.halifax.co.uk 3 2026-08-12 2026-09-11
mymortgage-staging.halifax.co.uk 2 2025-07-01 2026-06-14
aip-staging.halifax.co.uk 5 2025-07-01 2026-08-28
calculator-staging.halifax.co.uk 2 2025-07-01 2026-06-14
mortgages-staging.halifax.co.uk 5 2025-07-01 2026-08-28
tracking.emails.carleasing.halifax.co.uk 5 2026-06-07 2026-10-03
api.halifax.co.uk 3 2025-08-29 2026-01-30
secure-api.halifax.co.uk 4 2025-11-10 2026-05-31
tpp01-secure-api.halifax.co.uk 1 2026-05-13 2026-05-13
luat01-secure-api.halifax.co.uk 1 2025-11-10 2025-11-10
nft01-secure-api.halifax.co.uk 2 2025-09-12 2026-08-13
sit01-secure-api.halifax.co.uk 2 2025-09-12 2026-08-13
luat02-secure-api.halifax.co.uk 1 2025-11-10 2025-11-10
sit02-secure-api.halifax.co.uk 2 2025-09-12 2026-08-13
sit03-secure-api.halifax.co.uk 2 2025-09-12 2026-08-13
sandbox.secure-api.halifax.co.uk 4 2025-11-10 2026-05-31
nft01-authorise-api.halifax.co.uk 1 2026-01-20 2026-01-20
sit01-authorise-api.halifax.co.uk 1 2026-01-20 2026-01-20
sit02-authorise-api.halifax.co.uk 1 2026-01-20 2026-01-20
sit03-authorise-api.halifax.co.uk 1 2026-06-07 2026-06-07
secure-channel-api.halifax.co.uk 14 2025-08-01 2026-08-29
nft00-secure-channel-api.halifax.co.uk 4 2025-06-12 2026-07-20
luat01-secure-channel-api.halifax.co.uk 6 2025-08-08 2026-09-09
nft01-secure-channel-api.halifax.co.uk 9 2025-06-30 2026-08-09
sit01-secure-channel-api.halifax.co.uk 9 2025-06-30 2026-08-09
luat02-secure-channel-api.halifax.co.uk 6 2025-08-08 2026-09-09
sit02-secure-channel-api.halifax.co.uk 9 2025-06-30 2026-08-09
luat-api.halifax.co.uk 3 2025-08-31 2026-08-27
nft-api.halifax.co.uk 3 2025-09-01 2026-08-27
logos1-cashback.halifax.co.uk 2 2025-07-18 2026-07-14
logos3-cashback.halifax.co.uk 2 2025-07-18 2026-07-14
link.halifax.co.uk 2 2025-09-30 2025-10-07
home-quote-l.halifax.co.uk 11 2026-01-06 2026-09-11
home-energy-saving-tool.halifax.co.uk 5 2025-08-11 2026-10-06
map.halifax.co.uk 9 2025-06-19 2026-08-06
aip.halifax.co.uk 6 2025-07-17 2026-08-06
secure-api-cop.halifax.co.uk 9 2025-08-19 2026-08-27
luat01-secure-api-cop.halifax.co.uk 8 2025-08-18 2026-08-27
nft01-secure-api-cop.halifax.co.uk 9 2025-07-03 2026-08-09
sit01-secure-api-cop.halifax.co.uk 9 2025-07-03 2026-08-09
luat02-secure-api-cop.halifax.co.uk 8 2025-08-18 2026-08-27
sit02-secure-api-cop.halifax.co.uk 9 2025-07-03 2026-08-09
sit03-secure-api-cop.halifax.co.uk 9 2025-07-03 2026-08-09
luat-secure-api-cop.halifax.co.uk 5 2025-09-10 2026-08-27
authorise-api-cop.halifax.co.uk 7 2025-08-18 2026-09-03
luat01-authorise-api-cop.halifax.co.uk 10 2025-08-14 2026-08-27
nft01-authorise-api-cop.halifax.co.uk 9 2025-07-03 2026-08-09
sit01-authorise-api-cop.halifax.co.uk 9 2025-07-03 2026-08-09
luat02-authorise-api-cop.halifax.co.uk 10 2025-08-14 2026-08-27
sit02-authorise-api-cop.halifax.co.uk 9 2025-07-03 2026-08-09
sit03-authorise-api-cop.halifax.co.uk 9 2025-07-03 2026-08-09
customer.halifax.co.uk 2 2026-03-02 2026-08-10
www.customer.halifax.co.uk 2 2026-03-02 2026-08-10
developer.halifax.co.uk 1 2025-10-01 2025-10-01
calculator.halifax.co.uk 2 2025-07-17 2026-07-12
pension-calculator.halifax.co.uk 2 2025-07-21 2026-07-31
overpaymentcalculator.halifax.co.uk 6 2025-07-25 2026-08-06
home-quote-s.halifax.co.uk 10 2026-01-06 2026-09-11
secure-api-eidas.halifax.co.uk 2 2025-12-04 2025-12-04
nft00-secure-api-eidas.halifax.co.uk 2 2025-11-17 2025-12-03
luat01-secure-api-eidas.halifax.co.uk 2 2025-12-04 2025-12-04
nft01-secure-api-eidas.halifax.co.uk 2 2025-11-17 2025-12-03
sit01-secure-api-eidas.halifax.co.uk 2 2025-11-17 2025-12-03
luat02-secure-api-eidas.halifax.co.uk 2 2025-12-04 2025-12-04
sit02-secure-api-eidas.halifax.co.uk 2 2025-11-17 2025-12-03
sit03-secure-api-eidas.halifax.co.uk 2 2025-11-17 2025-12-03
rewards.halifax.co.uk 3 2025-08-01 2026-07-28
mortgages.halifax.co.uk 6 2025-07-17 2026-08-06
images.halifax.co.uk 2 2025-07-04 2026-06-15
branches.halifax.co.uk 10 2026-05-06 2026-09-01
tracking.updates.halifax.co.uk 5 2026-06-02 2026-09-28
tracking.ppupdates.halifax.co.uk 3 2026-07-09 2026-09-06
applinks.halifax.co.uk 1 2026-05-05 2026-05-05
image.emails.halifax.co.uk 1 2026-02-12 2026-02-12
link.emails.halifax.co.uk 1 2026-02-11 2026-02-11
image.commercialemails.halifax.co.uk 1 2026-02-12 2026-02-12
link.commercialemails.halifax.co.uk 1 2026-02-11 2026-02-11
links.commercialemails.halifax.co.uk 2 2025-09-29 2025-10-07
homeinsurance-claims.halifax.co.uk 6 2025-06-12 2026-09-09
homeinsuranceclaims.halifax.co.uk 6 2025-11-11 2026-09-09

Showing the first 100 hostnames — sign in with GitHub or Google to page the full list, or use the API with an API key: GET /v1/hosts/halifax.co.uk.

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/halifax.co.uk.