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) · 253 ms

HostCertsFirst seenLast seen
costar.com 5 2025-08-04 2026-08-11
*.costar.com 1 2026-01-29 2026-01-29
hospitality-tst-rele-01.costar.com 3 2026-05-14 2026-08-10
hospitality-tst-main-01.costar.com 3 2026-05-14 2026-08-10
n001.costar.com 3 2026-06-02 2026-08-11
p001.costar.com 5 2026-05-01 2026-09-23
edsf-101.costar.com 4 2026-05-22 2026-07-31
voice01.costar.com 5 2025-10-30 2026-08-30
www.voice01.costar.com 5 2025-10-30 2026-08-30
mcp-dvm-ref-use1.costar.com 3 2026-07-29 2026-10-03
platform-caig-use1.costar.com 1 2026-09-23 2026-09-23
platform-caig-tsm-use1.costar.com 1 2026-09-19 2026-09-19
mcp-tsm-use1.costar.com 3 2026-06-30 2026-09-04
platform-caig-dvm-use1.costar.com 1 2026-09-19 2026-09-19
mcp-dvm-use1.costar.com 3 2026-06-30 2026-09-04
mcp-use1.costar.com 3 2026-07-13 2026-09-17
platform-caig-tsr-use1.costar.com 1 2026-09-23 2026-09-23
mcp-tsr-use1.costar.com 3 2026-06-30 2026-09-04
cppm1.costar.com 1 2025-11-24 2025-11-24
www.cppm1.costar.com 1 2025-11-24 2025-11-24
ahprdcdn1.costar.com 4 2025-08-04 2026-08-11
ahtstcdn1.costar.com 2 2025-10-27 2026-07-28
ahdevcdn1.costar.com 5 2025-08-18 2026-07-28
pds1.costar.com 4 2025-08-04 2026-08-11
t0-pds1.costar.com 5 2025-10-24 2026-09-25
t1-pds1.costar.com 5 2025-10-24 2026-09-25
t2-pds1.costar.com 5 2025-10-24 2026-09-25
t3-pds1.costar.com 5 2025-10-24 2026-09-25
product1.costar.com 4 2025-08-04 2026-08-11
cs-test1.costar.com 5 2025-08-18 2026-07-28
n002.costar.com 5 2026-04-28 2026-09-15
voice02.costar.com 5 2025-10-30 2026-08-30
ahprdcdn2.costar.com 4 2025-08-04 2026-08-11
ahtstcdn2.costar.com 2 2025-10-27 2026-07-28
pds2.costar.com 4 2025-08-04 2026-08-11
t0-pds2.costar.com 5 2025-10-24 2026-09-25
t1-pds2.costar.com 5 2025-10-24 2026-09-25
t2-pds2.costar.com 5 2025-10-24 2026-09-25
t3-pds2.costar.com 5 2025-10-24 2026-09-25
product2.costar.com 4 2025-08-04 2026-08-11
platform-caig-usw2.costar.com 1 2026-09-23 2026-09-23
platform-caig-tsm-usw2.costar.com 1 2026-09-19 2026-09-19
mcp-tsm-usw2.costar.com 3 2026-06-30 2026-09-04
mcp-usw2.costar.com 3 2026-07-14 2026-09-18
property2.costar.com 4 2025-08-04 2026-08-11
t0.property2.costar.com 4 2025-08-04 2026-08-11
t1.property2.costar.com 4 2025-08-04 2026-08-11
t2.property2.costar.com 4 2025-08-04 2026-08-11
mcp-apz2.costar.com 3 2026-07-14 2026-09-18
n003.costar.com 5 2026-04-27 2026-09-14
cppm3.costar.com 1 2026-05-25 2026-05-25
www.cppm3.costar.com 1 2026-05-25 2026-05-25
sv-5409wm3.costar.com 1 2026-01-04 2026-01-04
www.sv-5409wm3.costar.com 1 2026-01-04 2026-01-04
ahprdcdn3.costar.com 4 2025-08-04 2026-08-11
ahtstcdn3.costar.com 2 2025-10-27 2026-07-28
pds3.costar.com 4 2025-08-04 2026-08-11
t0-pds3.costar.com 5 2025-10-24 2026-09-25
t1-pds3.costar.com 5 2025-10-24 2026-09-25
t2-pds3.costar.com 5 2025-10-24 2026-09-25
t3-pds3.costar.com 5 2025-10-24 2026-09-25
product3.costar.com 4 2025-08-04 2026-08-11
property3.costar.com 4 2025-08-04 2026-08-11
t0.property3.costar.com 4 2025-08-04 2026-08-11
t1.property3.costar.com 4 2025-08-04 2026-08-11
t2.property3.costar.com 4 2025-08-04 2026-08-11
hospitality-tst-rele-04.costar.com 3 2026-05-14 2026-08-10
hospitality-tst-main-04.costar.com 3 2026-05-14 2026-08-10
n004.costar.com 5 2026-05-08 2026-08-18
ahprdcdn4.costar.com 4 2025-08-04 2026-08-11
ahtstcdn4.costar.com 2 2025-10-27 2026-07-28
static.costar.com 5 2026-05-01 2026-09-23
image.mc.costar.com 2 2026-04-02 2026-09-23
publicrecord.costar.com 6 2026-05-14 2026-10-01
prd.costar.com 4 2026-03-26 2026-09-10
adsperformance-prd.costar.com 5 2026-04-27 2026-09-14
showcase-prd.costar.com 4 2025-08-04 2026-08-11
my-data-api-prd.costar.com 2 2026-10-02 2026-10-02
communication-prd.costar.com 5 2026-04-28 2026-09-15
aptsfeed-data-migration-prd.costar.com 5 2026-05-01 2026-09-23
marketanalytics-prd.costar.com 5 2026-05-01 2026-09-23
pds-prd.costar.com 5 2026-05-01 2026-09-23
we-twilio-services-prd.costar.com 5 2026-05-01 2026-09-23
cs-host-prd.costar.com 5 2026-05-01 2026-09-23
gateway-prd.costar.com 4 2025-08-04 2026-08-11
news-central-repository-prd.costar.com 5 2026-05-05 2026-09-14
trustsafety-prd.costar.com 5 2026-05-01 2026-09-23
*.prd.costar.com 4 2026-03-26 2026-09-10
cloud.e.costar.com 4 2025-10-10 2026-08-31
costar-rpc-service.costar.com 1 2026-08-14 2026-08-14
showcase-tst-rele.costar.com 2 2025-10-27 2026-07-28
mobilebff-tst-rele.costar.com 2 2025-10-27 2026-07-28
listingmanager-tst-rele.costar.com 2 2025-10-27 2026-07-28
marketingcenter-tst-rele.costar.com 5 2025-08-18 2026-07-28
pds-tst-rele.costar.com 2 2025-10-27 2026-07-28
products-tst-rele.costar.com 2 2025-10-27 2026-07-28
product-tst-rele.costar.com 3 2026-06-02 2026-08-11
gateway-tst-rele.costar.com 2 2025-10-27 2026-07-28
hospitality-tst-rele.costar.com 3 2026-05-14 2026-08-10
mobilebff-dev-rele.costar.com 2 2025-10-27 2026-07-28

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/costar.com.

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/costar.com.