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.

100 hosts (first page) · 493 ms

HostCertsFirst seenLast seenDNS
vsp.com 31 2025-06-18 2026-10-02 ok
*.vsp.com 36 2025-06-18 2026-09-23 —
wkstnconnect2020.vsp.com 18 2025-07-23 2026-09-22 ok
nlams-sipvg2-a-1.vsp.com 4 2026-05-08 2026-09-22 ok
nlams-sipvg2-b-1.vsp.com 1 2026-06-22 2026-06-22 ok
ext-dme-1.vsp.com 19 2025-07-02 2026-09-22 ok
ushq1prdwddse01.vsp.com 18 2025-06-18 2026-09-22 nxdomain
usmlvprdwwlnk01.vsp.com 18 2025-06-18 2026-09-22 nxdomain
ushq1isepol01.vsp.com 20 2025-06-18 2026-09-22 ok
nlisepol01.vsp.com 20 2025-06-18 2026-09-22 ok
usmlvisepol01.vsp.com 20 2025-06-18 2026-09-22 ok
jptkyisepol01.vsp.com 20 2025-06-18 2026-09-22 ok
sapbwp01.vsp.com 5 2025-09-30 2026-04-21 nxdomain
websapbnq01.vsp.com 18 2025-06-18 2026-09-22 ok
websapbxq01.vsp.com 18 2025-06-18 2026-09-22 ok
doctor-a1.vsp.com 18 2025-06-18 2026-09-22 nxdomain
ra1.vsp.com 12 2025-09-30 2026-09-23 ok
ushqprdwvdiuag1.vsp.com 18 2025-08-10 2026-09-22 ok
ushq1prdwvdici1.vsp.com 18 2025-08-10 2026-09-22 nxdomain
doctor-p1.vsp.com 19 2025-06-18 2026-10-01 nxdomain
ushq1-sipvg-ms1.vsp.com 18 2025-06-18 2026-09-22 nxdomain
nl-sipvg-ms1.vsp.com 12 2025-10-16 2026-09-22 ok
doctor-a2.vsp.com 18 2025-06-18 2026-09-22 nxdomain
ra2.vsp.com 12 2025-09-30 2026-09-23 ok
ushqprdwvdiuag2.vsp.com 18 2025-08-10 2026-09-22 ok
ushq1prdwvdici2.vsp.com 18 2025-08-10 2026-09-22 nxdomain
doctor-p2.vsp.com 19 2025-06-18 2026-10-01 nxdomain
ushq1-sipvg-ms2.vsp.com 18 2025-06-18 2026-09-22 nxdomain
doctor-a3.vsp.com 18 2025-06-18 2026-09-22 nxdomain
ra3.vsp.com 12 2025-09-30 2026-09-23 ok
doctor-p3.vsp.com 19 2025-06-18 2026-10-01 nxdomain
doctor-a4.vsp.com 18 2025-06-18 2026-09-22 nxdomain
ra4.vsp.com 12 2025-09-30 2026-09-23 ok
doctor-p4.vsp.com 19 2025-06-18 2026-10-01 nxdomain
doctor-a5.vsp.com 18 2025-06-18 2026-09-22 nxdomain
ra5.vsp.com 12 2025-09-30 2026-09-23 ok
doctor-p5.vsp.com 19 2025-06-18 2026-10-01 nxdomain
ise-portal-2025-2026.vsp.com 11 2025-06-18 2026-03-17 nxdomain
doctor-a6.vsp.com 18 2025-06-18 2026-09-22 nxdomain
ra6.vsp.com 13 2025-09-30 2026-09-23 ok
doctor-p6.vsp.com 19 2025-06-18 2026-10-01 nxdomain
ise-portal-2026-2027.vsp.com 7 2026-03-18 2026-05-08 nxdomain
doctor-a7.vsp.com 18 2025-06-18 2026-09-22 nxdomain
ra7.vsp.com 12 2025-09-30 2026-09-23 ok
doctor-p7.vsp.com 19 2025-06-18 2026-10-01 nxdomain
doctor-a8.vsp.com 18 2025-06-18 2026-09-22 nxdomain
ra8.vsp.com 12 2025-09-30 2026-09-23 nxdomain
doctor-p8.vsp.com 19 2025-06-18 2026-10-01 nxdomain
ra9.vsp.com 12 2025-09-30 2026-09-23 nxdomain
doctor-p9.vsp.com 19 2025-06-18 2026-10-01 nxdomain
USMLVPRDWDDPE.vsp.com 17 2025-06-18 2026-09-22 —
Vzsbcaas01a.vsp.com 1 2026-01-21 2026-01-21 —
Vzsbcaas02a.vsp.com 1 2026-01-21 2026-01-21 —
magnolia.vsp.com 1 2026-01-20 2026-01-20 nodata
ra.vsp.com 13 2025-09-30 2026-09-23 ok
casa.vsp.com 3 2026-09-15 2026-09-16 nodata
employerhub.vsp.com 12 2025-08-27 2026-09-10 nodata
pub.vsp.com 16 2025-07-09 2026-09-22 nodata
ftp-pub.vsp.com 18 2025-06-18 2026-09-22 ok
mvp2.pub.vsp.com 2 2025-09-19 2026-08-20 ok
cname-test2.pub.vsp.com 2 2026-05-22 2026-05-22 nodata
cname-test3.pub.vsp.com 1 2026-05-22 2026-05-22 nodata
casa.pub.vsp.com 2 2026-09-09 2026-09-16 ok
magnolia-public.pub.vsp.com 1 2026-01-20 2026-01-20 nxdomain
chat-poc.pub.vsp.com 2 2025-07-23 2026-06-23 ok
cust-serv-poc.pub.vsp.com 2 2026-03-26 2026-08-26 ok
curity-poc.pub.vsp.com 3 2026-03-18 2026-08-18 ok
api-vc.pub.vsp.com 2 2025-07-09 2026-06-09 ok
sold-rates-prod.pub.vsp.com 3 2026-05-07 2026-05-20 ok
claim-ui-prd.pub.vsp.com 1 2025-11-12 2025-11-12 ok
medical-fee-import-ui-prd.pub.vsp.com 2 2026-05-15 2026-07-15 ok
product-view-ui-stage.pub.vsp.com 2 2026-09-01 2026-10-05 ok
product-explorer-stage.pub.vsp.com 2 2026-09-01 2026-10-02 ok
magnolia-insecure.pub.vsp.com 1 2026-01-20 2026-01-20 nodata
vml-rewrite.pub.vsp.com 1 2026-01-14 2026-01-14 ok
casa-training.pub.vsp.com 3 2026-08-24 2026-08-27 ok
casa-stg.pub.vsp.com 2 2026-08-24 2026-08-24 nodata
employerhub-stg.pub.vsp.com 10 2025-12-19 2026-09-09 ok
api-vc-stg.pub.vsp.com 2 2025-07-09 2026-06-09 ok
client-experience-stg.pub.vsp.com 2 2025-12-19 2026-03-02 nodata
vml-rewrite-stg.pub.vsp.com 1 2026-01-08 2026-01-08 ok
employerhubi-stg.pub.vsp.com 4 2026-03-02 2026-08-05 ok
client-employerhubi-stg.pub.vsp.com 1 2026-03-05 2026-03-05 nodata
api-stg.pub.vsp.com 13 2025-10-07 2026-09-22 ok
claim-ui-stg.pub.vsp.com 1 2026-01-07 2026-01-07 ok
cms-lettergen-ui-stg.pub.vsp.com 2 2026-02-22 2026-07-10 ok
stock-order-ui-stg.pub.vsp.com 1 2025-06-20 2025-06-20 nodata
modify-stock-order-ui-stg.pub.vsp.com 4 2025-06-20 2026-05-21 ok
medical-fee-import-ui-stg.pub.vsp.com 2 2026-05-15 2026-07-10 ok
restore-eligibility-ui-stg.pub.vsp.com 2 2025-06-18 2026-05-19 ok
claim-internal-audit-portal-stg.pub.vsp.com 2 2026-03-17 2026-08-17 ok
eids-client-admin-tool-app-stg.pub.vsp.com 2 2026-08-11 2026-08-11 ok
another-eids-client-admin-tool-app-stg.pub.vsp.com 2 2026-08-11 2026-08-11 ok
provider-1099s-app-stg.pub.vsp.com 2 2026-08-11 2026-08-11 ok
another-provider-1099s-app-stg.pub.vsp.com 2 2026-08-11 2026-08-11 ok
provider-debits-app-stg.pub.vsp.com 2 2026-08-11 2026-08-11 ok
another-provider-debits-app-stg.pub.vsp.com 2 2026-08-11 2026-08-11 ok
start-vsp-stg.pub.vsp.com 3 2025-10-02 2026-09-03 ok
techradar-stg.pub.vsp.com 3 2025-09-12 2026-08-13 ok
product-sbr-stg.pub.vsp.com 1 2026-06-05 2026-06-05 ok

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/vsp.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/vsp.com.